Annual report pursuant to Section 13 and 15(d)

STOCK INCENTIVE PLAN (Details 4)

v3.8.0.1
STOCK INCENTIVE PLAN (Details 4) - $ / shares
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Options 1,428,462 1,720,000 1,581,123
Weighted Average Contractual Life Remaining (Years) 3 years 8 months 12 days    
Weighted Average Exercise Price $ 5.20    
Exercisable Options 934,959    
Exercisable at end of period $ 5.66    
Range of Exercise Prices From $2.38 to $3.37 [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Range of Exercise Prices, Lower Limit 2.38    
Range of Exercise Prices, Upper Limit $ 3.37    
Options 351,370    
Weighted Average Contractual Life Remaining (Years) 3 years 2 months 12 days    
Weighted Average Exercise Price $ 2.65    
Exercisable Options 215,370    
Exercisable at end of period $ 2.59    
Range of Exercise Prices From $3.38 to $4.42 [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Range of Exercise Prices, Lower Limit 3.38    
Range of Exercise Prices, Upper Limit $ 4.42    
Options 4,250    
Weighted Average Contractual Life Remaining (Years) 2 years 2 months 12 days    
Weighted Average Exercise Price $ 3.99    
Exercisable Options 4,250    
Exercisable at end of period $ 3.99    
Range of Exercise Prices From $4.43 to $4.85 [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Range of Exercise Prices, Lower Limit 4.43    
Range of Exercise Prices, Upper Limit $ 4.85    
Options 428,292    
Weighted Average Contractual Life Remaining (Years) 5 years 8 months 12 days    
Weighted Average Exercise Price $ 4.85    
Exercisable Options 83,039    
Exercisable at end of period $ 4.85    
Range of Exercise Prices From $4.86 to $6.65 [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Range of Exercise Prices, Lower Limit 4.86    
Range of Exercise Prices, Upper Limit $ 6.65    
Options 61,000    
Weighted Average Contractual Life Remaining (Years) 1 year 3 months 18 days    
Weighted Average Exercise Price $ 5.35    
Exercisable Options 57,250    
Exercisable at end of period $ 5.38    
Range of Exercise Prices From $6.66 to $7.54 [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Range of Exercise Prices, Lower Limit 6.66    
Range of Exercise Prices, Upper Limit $ 7.54    
Options 553,550    
Weighted Average Contractual Life Remaining (Years) 2 years 8 months 12 days    
Weighted Average Exercise Price $ 6.92    
Exercisable Options 553,550    
Exercisable at end of period $ 6.92    
Range of Exercise Prices From $7.55 to $8.76 [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Range of Exercise Prices, Lower Limit 7.55    
Range of Exercise Prices, Upper Limit $ 8.76    
Options 30,000    
Weighted Average Contractual Life Remaining (Years) 3 years 9 months 18 days    
Weighted Average Exercise Price $ 8.37    
Exercisable Options 21,500    
Exercisable at end of period $ 8.38