Net Loss Per Share - Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Numerator:
Net loss	$ (17,024)	$ (9,526)	$ (27,400)	$ (18,660)
Net loss attributable to common stockholders for basic and diluted loss per share	$ (17,024)	$ (9,526)	$ (27,400)	$ (18,660)
Denominator:
Net loss per share attributable to common stockholders - basic	$ (0.15)	$ (0.12)	$ (0.24)	$ (0.24)
Net loss per share attributable to common stockholders - Diluted	$ (0.15)	$ (0.12)	$ (0.24)	$ (0.24)
Weighted average number of common shares outstanding - basic	113,248,937	76,389,525	113,248,937	76,384,077
Weighted average number of common shares outstanding - Diluted	113,248,937	76,389,525	113,248,937	76,384,077
Exercise of the pre-funded warrants	24,930,483	16,718,418	24,930,483	16,718,418