SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 4) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Net income (loss)	$ (1,321)	$ (13,439)	$ (4,493)	$ (11,392)
Weighted average outstanding shares of common stock	59,842,904	41,716,558	60,467,860	39,867,063
Common stock and common stock equivalents	59,842,904	41,716,558	60,467,860	39,867,063
Income (loss) per share:
Basic net income per share	$ (0.02)	$ (0.32)	$ (0.32)	$ (0.29)
Diluted net income per share	$ (0.02)	$ (0.07)	$ (0.07)	$ (0.29)