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CONSOLIDATED STATEMENT OF COMPREHENSIVE OPERATIONS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net loss	$ (52,767)	$ (50,628)	$ (75,577)
Other comprehensive income (loss):
Change in foreign currency translation adjustments	1	145	(78)
Total other comprehensive income (loss)	1	145	(78)
Comprehensive loss	$ (52,766)	$ (50,483)	$ (75,655)

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