Common Stock - Additional Information (Detail) - USD ($)			1 Months Ended	3 Months Ended		9 Months Ended
	Sep. 09, 2020	Mar. 05, 2020	Feb. 28, 2021	Mar. 31, 2021	Mar. 31, 2020	Sep. 30, 2020	Mar. 11, 2021	Nov. 13, 2020	Dec. 11, 2018
Series B Preferred Stock [Member]
Class Of Stock [Line Items]
Preferred stock, conversion basis			62
Number of shares issuable upon conversion			62,000
Series C Preferred Stock [Member]
Class Of Stock [Line Items]
Issuance of stock, shares		2,287
Share price		$ 9.22
Preferred stock, conversion basis			73
Number of shares issuable upon conversion			73,000	1,000
Common Stock [Member]
Class Of Stock [Line Items]
Issuance of stock, shares		1,046,249		257,185	1,046,249
At-The-Market Offering Program [Member]
Class Of Stock [Line Items]
Gross proceeds from issuance of common stock						$ 4,400,000
At-The-Market Offering Program [Member] | Common Stock [Member]
Class Of Stock [Line Items]
Issuance of stock, shares						257,185
Share price						$ 17.05
At-The-Market Offering Program [Member] | Sales Agreement [Member] | Cantor Fitzgerald & Co [Member]
Class Of Stock [Line Items]
Gross proceeds from issuance of common stock	$ 15,400,000
Common stock value remaining available for issuance	$ 34,600,000
At-The-Market Offering Program [Member] | Sales Agreement [Member] | Cantor Fitzgerald & Co [Member] | Maximum [Member]
Class Of Stock [Line Items]
Authorized offering value							$ 300,000,000.0		$ 200,000,000.0
Common stock available for issuance							$ 75,000,000.0	$ 34,000,000.0	$ 50,000,000.0