STOCK BASED COMPENSATION (Details) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	1,350,182	2,363,699	1,779,613	2,673,512
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price	$ 9.18	$ 7.91	$ 8.46	$ 7.46
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value		$ 2,326,963	$ 50,869	$ 5,485,248
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	66,188	281,750
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price	$ 6.08	$ 3.65
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value	$ 12,821	$ 1,343,872
Forfeited, Options	(363,243)	(28,063)
Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price	$ 6.24	$ 7.79
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number	1,192,587	1,870,852
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price	$ 9.36	$ 7.81
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value		$ 2,116,465
Stock based compensation expense	$ 2,500,000	$ 3,600,000
Unrecognized compensation expense	$ 18,688,000
Weighted-average period	1 year 9 months 18 days
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Accelerated Vesting, Number	130,375
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Accelerated Vesting, Number	24,001