STOCK OPTION PLANS (Details 1) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
2015 Equity Incentive Plan [Member]
Options [Roll Forward]
Outstanding options, beginning balance (in shares)	5,112,967	4,443,000	1,994,000
Granted (in shares)	1,497,300	1,077,000	2,622,500
Exercised (in shares)	(360,853)	(81,719)	(151,000)
Expired/forfeited (in shares)	(724,009)	(325,314)	(22,500)
Outstanding options, ending balance (in shares)	5,525,405	5,112,967	4,443,000
Non-vested options, ending balance (in shares)	2,355,719	2,641,832	3,115,313
Weighted-average exercise price [Roll Forward]
Outstanding options, beginning of period (in dollars per share)	$ 9.07	$ 4.94	$ 6.90
Granted (in dollars per share)	12.95	14.31	3.29
Exercised (in dollars per share)	6.22	4.22	2.32
Expired/forfeited (in dollars per share)	10.65	5.52	3.23
Outstanding options, ending balance (in dollars per share)	8.08	9.07	4.94
Non-vested option, send on period (in dollars per share)	$ 10.41	$ 8.21	$ 4.24
2005 Equity Incentive Plan [Member]
Options [Roll Forward]
Outstanding options, beginning balance (in shares)	316,760	328,560	330,084
Expired/forfeited (in shares)	(360)	(11,800)	(1,524)
Outstanding options, ending balance (in shares)	316,400	316,760	328,560
Weighted-average exercise price [Roll Forward]
Outstanding options, beginning of period (in dollars per share)	$ 14.31	$ 14.57	$ 13.49
Expired/forfeited (in dollars per share)	150.00	21.53	36.93
Outstanding options, ending balance (in dollars per share)	$ 14.15	$ 14.31	$ 14.57