Net Loss per Share Computation of Net Income (Loss) Per Share (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Schedule of Earnings Per Share, Basic and Diluted [Line Items]
Net income (loss)	$ (6,819)	$ (2,558)	$ (28,488)	$ (2,338)