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CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Statement of Comprehensive Income [Abstract]      
Net loss $ (33,477) $ (50,714) $ (49,451)
Comprehensive income (loss), net of income taxes:      
Foreign currency translation adjustment (4,703) (827) 103
Unrealized losses on available-for-sale securities (22) 0 0
Total other comprehensive loss, net of income taxes $ (38,202) $ (51,541) $ (49,348)