Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ 1,094	$ 22,268	$ (67,945)
OTHER COMPREHENSIVE (LOSS) INCOME:
Net actuarial (loss) gain on defined benefit pension plan	(332)	917	(1,252)
Reclassification of actuarial loss on defined benefit pension plan included in net income (loss)	97	143	90
Other comprehensive (loss) income before taxes	(235)	1,060	(1,162)
INCOME TAX (PROVISION) BENEFIT RELATED TO OTHER COMPREHENSIVE INCOME (LOSS)	0	0	0
OTHER COMPREHENSIVE (LOSS) INCOME—Net of tax	(235)	1,060	(1,162)
COMPREHENSIVE INCOME (LOSS)	859	23,328	(69,107)
LESS COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO NONCONTROLLING INTERESTS	1,434	13,633	(33,675)
COMPREHENSIVE (LOSS) INCOME ATTRIBUTABLE TO THE COMPANY	$ (575)	$ 9,695	$ (35,432)