Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Accumulated Deficit	Accumulated Deficit Cumulative Effect, Period of Adoption, Adjustment
Beginning balance (in shares) at Jun. 30, 2018			59,998,811
Beginning balance at Jun. 30, 2018	$ 142,688	$ 200	$ 375,436	$ (232,748)	$ 200
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock based compensation and exercises (in shares)			20,627
Stock-based compensation and exercises (net)	1,618		$ 1,618
Repurchase of stock option awards	(120)		$ (120)
Retirement of common stock (in shares)			(10,957)
Retirement of common stock	(81)		$ (81)
Net loss	(29,882)			(29,882)
Ending balance (in shares) at Jun. 30, 2019			60,008,481
Ending balance at Jun. 30, 2019	$ 114,423		$ 376,853	(262,430)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible Enumeration]	us-gaap:AccountingStandardsUpdate201613Member
Stock based compensation and exercises (in shares)			752,808
Stock-based compensation and exercises (net)	$ 3,110		$ 3,110
Net loss	(40,595)			(40,595)
Issuance of common stock in relation to private placement, net of offering costs incurred (in shares)			3,800,000
Issuance of common stock in relation to private placement, net of offering costs incurred	16,777		$ 16,777
Issuance of common stock to Hudson Executive Capital LP (in shares)			635,593
Issuance of common stock to Hudson Executive Capital LP	4,500		$ 4,500
Ending balance (in shares) at Jun. 30, 2020			65,196,882
Ending balance at Jun. 30, 2020	98,215	$ 348	$ 401,240	(303,025)	$ 348
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock based compensation and exercises (in shares)			319,011
Stock-based compensation and exercises (net)	9,145		$ 9,145
Net loss	(8,705)			(8,705)
Issuance of common stock in relation to private placement, net of offering costs incurred (in shares)			5,730,000
Issuance of common stock in relation to private placement, net of offering costs incurred	$ 52,390		$ 52,390
Exercise of warrants (in shares)	12,154
Ending balance (in shares) at Jun. 30, 2021			71,258,047
Ending balance at Jun. 30, 2021	$ 151,393		$ 462,775	$ (311,382)