INCOME TAXES - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred tax liabilities:
Property and equipment	$ (3,112)	$ (3,566)
Total deferred tax liabilities	(3,112)	(3,566)
Deferred tax assets:
Net operating loss carryforwards	117	80
Accruals and allowances	248	275
Tax credits	4	194
Other – net	229	207
Capital loss carryover	921	948
Total deferred tax assets	1,519	1,704
Valuation allowance	(921)	(1,096)
Deferred tax assets net of valuation allowance	598	608
Net deferred tax liabilities	$ (2,514)	$ (2,958)