SHARE-BASED COMPENSATION - Options Activity (Details)	12 Months Ended
	Dec. 31, 2020 USD ($) $ / shares shares
Number of Options
Options beginning (in shares) | shares	543,000
Options granted (in shares) | shares	66,000
Options assumed in the QLGG Acquisition (in shares) | shares	200,000
Options ending (in shares) | shares	809,329
Weighted Average Exercise Price
Weighted average exercise price - beginning (in dollars per shares) | $ / shares	$ 12.06
Options granted, weighted average exercise price (in dollars per share) | $ / shares	5.40
Options assumed in the QLGG Acquisition, weighted average exercise price (in dollars per share) | $ / shares	0.42
Weighted average exercise price - ending (in dollars per shares) | $ / shares	$ 8.63
Options vested and expected to vest, outstanding, weighted average remaining contractual term	3 years 7 months 6 days
Options, outstanding, intrinsic value | $	$ 406,000
Options, vested and expected to vest, outstanding, number (in shares) | shares	809,000
Options, vested and expected to vest, outstanding, weighted average exercise price (in dollars per shares) | $ / shares	$ 8.63
Options vested and expected to vest, outstanding, weighted average remaining contractual term	3 years 7 months 6 days
Options vested and expected to vest, outstanding, intrinsic value | $	$ 406,000
Options vested and exercisable, outstanding, number (in shares) | shares	561,550
Options vested and exercisable, outstanding, weighted average exercise price (in dollars per share) | $ / shares	$ 11.66
Options, vested and exercisable, weighted average remaining contractual term	3 years 3 months 18 days
Options, vested and exercisable, aggregate intrinsic value | $	$ 41,000
Unamortized compensation expense | $	$ 219,000
Options
Weighted Average Exercise Price
Weighted average remaining recognition period in years	1 year 2 months 12 days