The Company and Nature of Business (Details) - USD ($) $ / shares in Units, $ in Millions		1 Months Ended				3 Months Ended
	Oct. 19, 2020	Oct. 31, 2020	Feb. 29, 2020	Jan. 31, 2020	Oct. 31, 2018	Mar. 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				$ 50.3
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)			645,000
Public offering price (in dollars per share)			$ 21.50
Net proceeds from sale of stock			$ 13.0
Secondary offering by selling shareholders
Subsidiary, Sale of Stock [Line Items]
Allocated public offering costs						$ 0.2
Secondary offering by selling shareholders | Subsequent event
Subsidiary, Sale of Stock [Line Items]
Number of shares issued (in shares)	190,053
Public offering price (in dollars per share)	$ 22.00
Second follow-on public offering | Subsequent event
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		$ 71.9