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Stock Option Plan - Stock Option Activity (Details) - Stock options - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding, December 31, 2020 (in shares)	1,975,761
Granted (in shares)	88,750
Exercised (in shares)	(3,381)
Forfeited (in shares)	(17,197)
Expired (in shares)	(2,353)
Outstanding, March 31, 2021 (in shares)	2,041,580	1,975,761
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Outstanding, December 31, 2020, Weighted Average Exercise Price (in dollars per share)	$ 11.81
Granted, Weighted Average Exercise Price (in dollars per share)	18.20
Exercised, Weighted Average Exercise Price (in dollars per share)	12.94
Forfeited, Weighted Average Exercise Price (in dollars per share)	12.16
Expired, Weighted Average Exercise Price (in dollars per share)	29.08
Outstanding, March 31, 2021, Weighted Average Exercise Price (in dollars per share)	$ 12.06	$ 11.81
Stock Options, Additional Disclosures [Abstract]
Outstanding, Weighted Average Remaining Contractual Term	8 years 6 months 14 days	8 years 8 months 15 days
Vested and expected to vest, Weighted Average Remaining Contractual Term	8 years 6 months 14 days
Options exercisable, Weighted Average Remaining Contractual Term	8 years 21 days
Outstanding, Aggregate Intrinsic Value	$ 13,247	$ 6,750
Vested and expected to vest, Aggregate Intrinsic Value	13,247
Options exercisable, Aggregate Intrinsic Value	$ 6,013
Vested and expected to vest, March 31, 2021 (in shares)	2,041,580
Options exercisable, March 31, 2021 (in Shares)	665,878
Vested and expected to vest, March 31, 2021, Weighted Average Exercise Price (in dollars per share)	$ 12.06
Options exercised, March 31, 2021, Weighted Average Exercise Price (in dollars per share)	$ 9.52

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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