Annual report pursuant to Section 13 and 15(d)

STOCK-BASED COMPENSATION (Details 5)

v3.3.1.900
STOCK-BASED COMPENSATION (Details 5)
 12 Months Ended
Dec. 31, 2015
USD ($)
$ / shares
item
shares
Dec. 31, 2014
$ / shares
shares
Dec. 31, 2013
$ / shares
shares
Stock Based Compensation      
Total incremental fair value for the Purchase Plan reset | $ $ 792,000    
Employee Stock Purchase Plan      
Stock Based Compensation      
Purchase price expressed as a percentage of fair market value of common stock on the first day of the offering period 85.00%    
Purchase price expressed as a percentage of fair market value of common stock on the purchase date 85.00%    
Number of shares of common stock issued | shares 576,537 505,877 383,717
Average price of shares issued (in dollars per share) | $ / shares 2.03 2.24 2.74
Weighted average fair value of stock purchased (in dollars per share) | $ / shares $ 1.05 $ 1.42 $ 2.05
Number of shares of common stock available for future issuance | shares 3,001,616    
Award offering period 24 months    
Number of purchase periods per award offering period | item 4    
Award purchase period 6 months    
Total incremental fair value for the Purchase Plan reset | $ $ 577,000