Quarterly report pursuant to Section 13 or 15(d)

Basic and Diluted Net Income (Loss) Per Common Share (Details)

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Basic and Diluted Net Income (Loss) Per Common Share (Details) (USD $)
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Dec. 31, 2012
Basic and Diluted Net Income (Loss) Per Common Share [Abstract]          
Net income (loss) $ 867,000 $ (11,039,000) $ 4,221,000 $ (16,371,000) $ (12,531,000)
Weighted average shares outstanding (in shares) 25,111,713 24,160,686 24,957,183 24,116,316  
Basic net income (loss) per common share (in dollars per share) $ 0.03 $ (0.46) $ 0.17 $ (0.68)  
Net income (loss) $ 1,158,000 $ (11,039,000) $ 4,512,000 $ (16,371,000)  
Weighted average shares outstanding (in shares) 25,111,713 24,160,686 24,957,183 24,116,316  
Effect of dilutive options and warrants (in shares) 357,516 0 357,516 0  
Weighted average shares outstanding assuming dilution (in shares) 25,469,229 24,160,686 25,314,699 24,116,316  
Diluted net income (loss) per common share (in dollars per share) $ 0.03 $ (0.46) $ 0.17 $ (0.68)  
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]          
Antidilutive securities not included in computation of diluted net income (loss) per common share (in shares) 115,918,461 38,864,778 115,918,461 38,864,778  
Warrants [Member]
          
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]          
Antidilutive securities not included in computation of diluted net income (loss) per common share (in shares) 35,683,943 15,783,943 35,683,943 15,783,943  
Stock options [Member]
          
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]          
Antidilutive securities not included in computation of diluted net income (loss) per common share (in shares) 1,967,284 2,816,284 1,967,284 2,816,284  
Preferred Stock - A [Member]
          
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]          
Antidilutive securities not included in computation of diluted net income (loss) per common share (in shares) 58,267,234 20,264,551 58,267,234 20,264,551  
Preferred Stock - B [Member]
          
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]          
Antidilutive securities not included in computation of diluted net income (loss) per common share (in shares) 20,000,000 0 20,000,000 0