Annual report pursuant to Section 13 and 15(d)

401(k) PLAN (Details Textual)

v3.8.0.1
401(k) PLAN (Details Textual)
12 Months Ended
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Maximum annual contribution per employee under 401(k) plan $ 18,000 $ 18,000
Number of investment options | InvestmentOptions 50  
Company contributions under 401 (k) Plan $ 0 $ 0