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STOCK OPTION PLANS (Details) (USD $)
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12 Months Ended |
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Dec. 31, 2012
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Dec. 31, 2011
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2005 Equity Incentive Plan [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Shares authorized but unissued common stock (in shares) |
5,000,000
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| Dividend yield (in hundredths) |
0.00%
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0.00%
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| Volatility (in hundredths) |
98.00%
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117.00%
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| Risk-free interest rate (in hundredths) |
0.45%
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1.42%
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| Expected lives |
5 years 6 months
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5 years 7 months 6 days
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| Weighted average fair value of options granted (in dollars per share) |
$ 0.29
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$ 1.87
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| Options [Roll Forward] |
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| Outstanding options, beginning balance (in shares) |
2,266,784
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1,748,733
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| Granted (in shares) |
1,235,000
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580,000
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| Exercised/forfeited (in shares) |
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(61,949)
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| Expired/forfeited (in shares) |
(838,000)
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| Outstanding options, ending balance (in shares) |
2,663,784
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2,266,784
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| Exercisable, ending balance (in shares) |
1,797,742
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| Weighted- average exercise price [Roll Forward] |
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| Outstanding options, beginning of period (in dollars per share) |
$ 2.17
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$ 2.13
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| Granted (in dollars per share) |
$ 0.39
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$ 2.22
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| Exercised/forfeited (in dollars per share) |
|
$ 1.38
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| Expired/forfeited (in dollars per share) |
$ 2.14
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| Outstanding options, ending balance (in dollars per share) |
$ 1.36
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$ 2.17
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| Exercisable, end on period (in dollars per share) |
$ 1.72
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| Intrinsic value of options outstanding |
$ 7,000
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$ 324,000
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| Intrinsic value of options exercisable |
1,000
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324,000
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| Total intrinsic value of options exercised |
0
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0
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| Information regarding options outstanding by range of exercise prices [Abstract] |
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| Number of options outstanding (in shares) |
2,663,784
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| Number of options exercisable (in shares) |
1,797,742
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2005 Equity Incentive Plan [Member] | $0.23 [Member]
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| Information regarding options outstanding by range of exercise prices [Abstract] |
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| Range of exercise prices, Upper range limit (in dollars per share) |
$ 0.23
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| Number of options outstanding (in shares) |
725,000
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| Options outstanding, Weighted average, Remaining life in years |
10 years
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| Options outstanding, Weighted average, Exercise price (in dollars per share) |
$ 0.23
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| Number of options exercisable (in shares) |
106,250
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| Options exercisable, Weighted average, Remaining life in years |
10 years
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| Options exercisable, Weighted average, Exercise price (in dollars per share) |
$ 0.23
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2005 Equity Incentive Plan [Member] | $0.61 - 0.85 [Member]
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| Information regarding options outstanding by range of exercise prices [Abstract] |
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| Range of exercise prices, Lower range limit (in dollars per share) |
$ 0.61
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| Range of exercise prices, Upper range limit (in dollars per share) |
$ 0.85
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| Number of options outstanding (in shares) |
640,000
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| Options outstanding, Weighted average, Remaining life in years |
7 years 3 months 18 days
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| Options outstanding, Weighted average, Exercise price (in dollars per share) |
$ 0.63
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| Number of options exercisable (in shares) |
510,000
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| Options exercisable, Weighted average, Remaining life in years |
6 years 8 months 12 days
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| Options exercisable, Weighted average, Exercise price (in dollars per share) |
$ 0.63
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2005 Equity Incentive Plan [Member] | $1.38 [Member]
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| Information regarding options outstanding by range of exercise prices [Abstract] |
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| Range of exercise prices, Upper range limit (in dollars per share) |
$ 1.38
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| Number of options outstanding (in shares) |
220,000
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| Options outstanding, Weighted average, Remaining life in years |
7 years
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| Options outstanding, Weighted average, Exercise price (in dollars per share) |
$ 1.38
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| Number of options exercisable (in shares) |
220,000
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| Options exercisable, Weighted average, Remaining life in years |
7 years
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| Options exercisable, Weighted average, Exercise price (in dollars per share) |
$ 1.38
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2005 Equity Incentive Plan [Member] | $2.27-3.15 [Member]
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| Information regarding options outstanding by range of exercise prices [Abstract] |
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| Range of exercise prices, Lower range limit (in dollars per share) |
$ 2.27
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| Range of exercise prices, Upper range limit (in dollars per share) |
$ 3.15
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| Number of options outstanding (in shares) |
1,078,784
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| Options outstanding, Weighted average, Remaining life in years |
7 years 10 months 24 days
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| Options outstanding, Weighted average, Exercise price (in dollars per share) |
$ 2.54
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| Number of options exercisable (in shares) |
961,492
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| Options exercisable, Weighted average, Remaining life in years |
7 years 10 months 24 days
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| Options exercisable, Weighted average, Exercise price (in dollars per share) |
$ 2.55
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2007 Special Stock Option Plan [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Shares authorized but unissued common stock (in shares) |
450,000
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| Information regarding options outstanding by range of exercise prices [Abstract] |
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| Number of shares available for grant (in shares) |
450,000
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1995 Stock Awards Plan [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Shares authorized but unissued common stock (in shares) |
500,000
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| Options [Roll Forward] |
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| Outstanding options, beginning balance (in shares) |
57,500
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59,500
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| Expired/forfeited (in shares) |
(18,000)
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(2,000)
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| Outstanding options, ending balance (in shares) |
39,500
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57,500
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| Exercisable, ending balance (in shares) |
39,500
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| Weighted- average exercise price [Roll Forward] |
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| Outstanding options, beginning of period (in dollars per share) |
$ 16.58
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$ 16.80
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| Expired (in dollars per share) |
$ 18.14
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$ 23.05
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| Outstanding options, ending balance (in dollars per share) |
$ 15.87
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$ 16.58
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| Exercisable, end on period (in dollars per share) |
$ 15.87
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| Intrinsic value of options outstanding |
0
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0
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| Intrinsic value of options exercisable |
$ 0
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$ 0
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| Information regarding options outstanding by range of exercise prices [Abstract] |
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| Number of options outstanding (in shares) |
39,500
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| Number of options exercisable (in shares) |
39,500
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| Number of shares available for grant (in shares) |
0
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| Options exercisable over a period |
10 years
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1995 Stock Awards Plan [Member] | Minimum [Member]
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| Information regarding options outstanding by range of exercise prices [Abstract] |
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| Options granted and vest ratably over a period |
4 years
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1995 Stock Awards Plan [Member] | Maximum [Member]
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| Information regarding options outstanding by range of exercise prices [Abstract] |
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| Options granted and vest ratably over a period |
5 years
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1995 Stock Awards Plan [Member] | $10.10 - 12.40 [Member]
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| Information regarding options outstanding by range of exercise prices [Abstract] |
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| Range of exercise prices, Lower range limit (in dollars per share) |
$ 10.10
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| Range of exercise prices, Upper range limit (in dollars per share) |
$ 12.40
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| Number of options outstanding (in shares) |
29,000
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| Options outstanding, Weighted average, Remaining life in years |
2 years 1 month 6 days
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| Options outstanding, Weighted average, Exercise price (in dollars per share) |
$ 11.09
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| Number of options exercisable (in shares) |
29,000
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| Options exercisable, Weighted average, Remaining life in years |
2 years 1 month 6 days
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| Options exercisable, Weighted average, Exercise price (in dollars per share) |
$ 11.09
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1995 Stock Awards Plan [Member] | $28.50 - 29.25 [Member]
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| Information regarding options outstanding by range of exercise prices [Abstract] |
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| Range of exercise prices, Lower range limit (in dollars per share) |
$ 28.50
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| Range of exercise prices, Upper range limit (in dollars per share) |
$ 29.25
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| Number of options outstanding (in shares) |
10,500
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| Options outstanding, Weighted average, Remaining life in years |
2 years
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| Options outstanding, Weighted average, Exercise price (in dollars per share) |
$ 29.07
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| Number of options exercisable (in shares) |
10,500
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| Options exercisable, Weighted average, Remaining life in years |
2 years
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| Options exercisable, Weighted average, Exercise price (in dollars per share) |
$ 29.07
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