Condensed Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - USD ($)	3 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020
Statement Of Stockholders Equity [Abstract]
At the market offering, commissions and issuance costs	$ 100,000	$ 200,000	$ 79,000	$ 43,000	$ 200,000
Private placement issuance costs					$ 37,000