Stockholders' Equity - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	12 Months Ended
	Dec. 31, 2019	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019	Nov. 10, 2020	Nov. 08, 2017
Class of Stock [Line Items]
Fair value of warrants		$ 22,355	$ 40,483
Aggregate Value of Securities Available Under Agreement		$ 175,700
Total authorized share capital		226,100,000
Common stock, shares authorized		226,000,000	226,000,000
Common stock, par value		$ 0.00000002	$ 0.00000002
Preferred stock, shares authorized		100,000	100,000
Preferred stock, par value		$ 0.01	$ 0.01
Preferred stock, shares issued		100,000
Common stock voting rights		one vote per share
Preferred stock, shares outstanding		0	0
Number Of Warrants Exercised		2,617	0
Number Of Shares Issued On Warrant Exercise		964
Common stock Value Issued		$ 3,136	$ 69,231	$ 5,444
Unsold Securities Shares and Warrants Under Agreement		107,500
Aggregate Value of Securities Available Under Agreement		$ 175,700
Warrants
Class of Stock [Line Items]
Exercise price		$ 2.54
Warrants outstanding		16,058,985
ATM Sales Agreement
Class of Stock [Line Items]
Aggregate Value of Securities Available Under Agreement		$ 100
Common stock share issued		958,083	5,471,684
Common stock Value Issued		$ 3,100	$ 20,700
Proceeds from offering net of costs	$ 400
Aggregate Value of Securities Available Under Agreement		100
Underwritten Registered Offering
Class of Stock [Line Items]
Common stock share issued	32,343,750
Offering price per share	$ 1.60
Proceeds from Issuance Initial Public Offering	$ 48,500
Payments of Stock Issuance Costs	$ 3,300
Two Thousand And Twenty At The Market Sale Agreement Member
Class of Stock [Line Items]
Aggregate value of securities available under shelf registration statement		60,000
Maximum
Class of Stock [Line Items]
Sale of shares and warrants under agreement		200,000
Maximum | ATM Sales Agreement
Class of Stock [Line Items]
Sale of shares under agreement						$ 30,000
Maximum | Two Thousand And Twenty At The Market Sale Agreement Member
Class of Stock [Line Items]
Sale of shares under agreement		$ 60,000			$ 60,000