The Company and Nature of Business (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended				12 Months Ended
	Oct. 31, 2020	Feb. 29, 2020	Jan. 31, 2020	Oct. 31, 2018	Dec. 31, 2020
IPO
Subsidiary, Sale of Stock [Line Items]
Number of shares issued (in shares)				8,280,000
Public offering price (in dollars per share)				$ 15.00
Net proceeds from sale of stock				$ 113.4
First follow-on public offering
Subsidiary, Sale of Stock [Line Items]
Number of shares issued (in shares)			2,490,053
Public offering price (in dollars per share)			$ 21.50
Net proceeds from sale of stock			$ 50.0
Allocated public offering costs					$ 0.4
First follow-on public offering and secondary offering
Subsidiary, Sale of Stock [Line Items]
Number of shares in transaction, including shares in secondary offering (in shares)			4,300,000
Underwriters option
Subsidiary, Sale of Stock [Line Items]
Number of shares issued (in shares)	478,507	645,000
Public offering price (in dollars per share)		$ 21.50
Net proceeds from sale of stock		$ 13.0
Second follow-on public offering
Subsidiary, Sale of Stock [Line Items]
Number of shares issued (in shares)	3,000,000
Public offering price (in dollars per share)	$ 22.00
Net proceeds from sale of stock	$ 71.6
Secondary offering by selling shareholders
Subsidiary, Sale of Stock [Line Items]
Number of shares issued (in shares)	190,053
Public offering price (in dollars per share)	$ 22.00
Allocated public offering costs					$ 0.2