Condensed Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - USD ($)	3 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019
Statement Of Stockholders Equity [Abstract]
At the market offering, commissions and issuance costs	$ 79,000	$ 43,000	$ 174,000
Private placement issuance costs			$ 37,075
Public and private offering issuance costs				$ 1,700,000