CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS
Foreign currency translation adjustment, tax expense (benefit)	$ 195	$ (227)	$ 267
Change in fair value from interest rate swap, tax expense (benefit)	(16)	(384)	(520)
Reclassification of fair value of interest rate swap, tax expense (benefit)	$ (765)	$ 0	$ 0

Amount, after adjustments, of tax (expense) benefit for increase (decrease) in other than temporary impairment (OTTI) on investment in held-to-maturity security, recognized in other comprehensive loss and attributable to parent.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration