ACCRUED EXPENSES (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
ACCRUED EXPENSES [Abstract]
Accrued compensation and benefits	$ 12,476	$ 3,785
Accrued real estate taxes	2,614	1,763
Other accrued expenses	1,602	2,321
Accrued expenses	$ 16,692	$ 7,869