SHARE-BASED COMPENSATION - Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended
	Jun. 30, 2021
Number of Options
Options beginning (in shares)	809,000
Options exercised (in shares)	(86,000)
Options ending (in shares)	723,395
Options vested and expected to vest as of: (in shares)	723,000
Options vested and exercisable (in shares)	574,487
Weighted average remaining recognition period in years	1 year
Unamortized compensation expense	$ 131
Weighted Average Exercise Price
Weighted average exercise price - beginning (in dollars per shares)	$ 8.63
Weighted Average Exercise Price - exercised (in dollars per shares)	0.38
Weighted average exercise price - ending (in dollars per shares)	9.61
Weighted average exercise price - vested and expected (in dollars per shares)	9.61
Weighted average exercise price - vested and exercisable (in dollars per shares)	$ 11.77
Weighted Average Remaining Contractual Term (Years)
Weighted Average Remaining Contractual Life, Outstanding	3 years 2 months 12 days
Weighted Average Remaining Contractual Life, Vested and Expected to Vest	3 years 2 months 12 days
Weighted Average Remaining Contractual Life, Vested and Exercisable	3 years
Intrinsic Value
Intrinsic Value, Outstanding	$ 563
Intrinsic Value, Vested and Expected to Vest	563
Intrinsic Value, Vested and Exercisable	$ 0