COMMITMENTS AND CONTINGENCIES (Details 2) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Operating leases
Right-of-use assets, net	$ 234	$ 257
Right-of-use lease liabilities, current	112	104
Right-of-use lease liabilities, noncurrent	141	174
Total operating lease liabilities	253	278
Finance lease right-to-use assets, net	37	40
Current liabilities	13	13
Noncurrent liabilities	24	27
Total financing lease liabilities	$ 37	$ 40
Weighted average remaining lease term, operating lease	2 years 3 months 14 days	2 years 14 days
Weighted average remaining lease term, finance lease	2 years 9 months 18 days	2 years 6 months 18 days
Weighted average discount rate, Operating leases	11.30%	11.30%
Weighted average discount rate, Financing leases	9.00%	9.00%