Net Loss Per Share - Computation of Basic and Diluted Net Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Numerator:
Net loss	$ (8,965)	$ (6,678)
Denominator:
Weighted average common shares outstanding, basic	151,609,440	145,647,226
Weighted average common shares outstanding, diluted	151,609,440	145,647,226
Net loss per share, basic	$ (0.06)	$ (0.05)
Net loss per share, diluted	$ (0.06)	$ (0.05)