SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (VIE) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019
Assets:
Accounts receivable, net	$ 443		$ 874
Total assets	33,540		20,713
Liabilities:
Accrued expenses	1,343		2,036
Total liabilities	6,282		6,551
Total stockholders' equity	27,258	$ 14,558	14,162	$ 12,627	$ 11,285	$ 13,205
Variable Interest Entity, Primary Beneficiary [Member]
Assets:
Accounts receivable, net	240		538
Total assets	240		538
Liabilities:
Accrued expenses	7		27
Total liabilities	7		27
Noncontrolling Interest in Joint Venture	31		27
Total stockholders' equity	$ 61		$ 53