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Income Taxes - Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Current:
Federal	$ 0	$ (49)
State	(4)	35
Foreign	93	1,148
Total current	89	1,134
Deferred:
Federal	12	12
State	0	0
Foreign	647	(610)
Total deferred	659	(598)
Provision for income taxes	$ 748	$ 536

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