CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Parentheticals) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Other comprehensive income (loss), tax	$ 0	$ 0	$ 0

Amount of tax expense (benefit) allocated to other comprehensive income (loss).

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+ Details