Going Concern - Additional Information (Details) $ / shares in Units, $ in Thousands					12 Months Ended		17 Months Ended
	Aug. 24, 2020 PromissoryNote	Apr. 14, 2020 USD ($)	Mar. 27, 2020 USD ($) $ / shares shares	Mar. 25, 2020 USD ($) $ / shares shares	Jun. 30, 2020 USD ($) shares	Jun. 30, 2019 USD ($) shares	Mar. 25, 2020 USD ($) $ / shares shares	Feb. 13, 2020 USD ($)	Sep. 05, 2019 USD ($)
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Cash and cash equivalents					$ 3,349	$ 1,588
Working capital					300
Net loss					8,311	7,534
Net cash used in operating activities					(6,931)	(8,475)
Net proceeds from sale of common stock					5,650	5,908
Proceeds from note payable					$ 542	$ 0
Common Stock
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Issuance of common stock registered direct offering | shares					1,806,000	1,491,000
Common Stock | Securities Purchase Agreement
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Issuance of common stock registered direct offering | shares			873,335	354,000
Common stock par value | $ / shares			$ 0.001	$ 0.001			$ 0.001
Common stock offering price per share | $ / shares			$ 3.75	$ 5.00			$ 5.00
Net proceeds from sale of common stock			$ 2,900	$ 1,600
Common Stock | Market Issuance Sales Agreement
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Issuance of common stock registered direct offering | shares							793,668
Net proceeds from sale of common stock							$ 2,300
Secured Promissory Note | Private Placement
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Secured note principal amount								$ 1,000	$ 1,500
Number of promissory notes | PromissoryNote	2
Extended maturity date	Sep. 05, 2021
PPP Promissory Note
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Proceeds from note payable		$ 542