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7. STOCK-BASED COMPENSATION (Details-Outstanding options and warrants) - Stock Options
$ / shares in Units, $ in Thousands
 6 Months Ended
Jun. 30, 2016
USD ($)
$ / shares
shares
STOCK BASED COMPENSATION  
Begining Balance | shares 931,667
Granted | shares 170,626
Exercised | shares (576,667)
Canceled or expired | shares (100,000)
Ending Balance | shares 425,626
Exercisable at the end | shares 241,667
Weighted Average Exercise price Per Common Share  
Begining Balance | $ / shares $ 4.69
Granted | $ / shares 6.01
Exercised | $ / shares 2.96
Canceled or expired | $ / shares 9.03
Ending Balance | $ / shares 6.55
Exercisable at the end | $ / shares $ 7.18
Weighted Average Remaining Contractual Life  
Ending Balance 4 years 4 months 13 days
Exercisable at the end 1 year 29 days
Aggregate Intrinsic Value  
Aggregate value outstanding | $ $ 178,200
Aggregate value exercisable | $ $ 130,500