Stock-Based Compensation - Restricted stock units equivalent activity under company's stock plans (Details) - Restricted Stock Units (RSUs) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2021 USD ($) $ / shares shares
Number of RSU Equivalents
Beginning balance (in shares) | shares	0
Granted (in shares) | shares	94,304
Ending balance (in shares) | shares	94,304
Weighted- Average Base Price
Beginning balance (in dollars per share) | $ / shares	$ 0
Granted (in dollars per share) | $ / shares	6.14
Ending balance (in dollars per share) | $ / shares	$ 6.14
Aggregate Intrinsic Value
Beginning aggregate intrinsic value | $	$ 0
Ending aggregate intrinsic value | $	$ 1,448