The Company and Nature of Business (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended			3 Months Ended	6 Months Ended
	Feb. 29, 2020	Jan. 31, 2020	Oct. 31, 2018	Mar. 31, 2020	Jun. 30, 2020	Jun. 30, 2019
Subsidiary, Sale of Stock [Line Items]
Payments of additional initial public offering related costs					$ 0	$ 167
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			$ 113,400
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		$ 50,300
Payments of additional initial public offering related costs				$ 400
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	$ 13,000
Secondary offering by selling shareholders
Subsidiary, Sale of Stock [Line Items]
Payments of additional initial public offering related costs				$ 200