CONDENSED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Shares	Additional paid in capital	Accumulated Deficit
Beginning Balance at Jun. 30, 2020	$ 78,218	$ 111,514	$ 355,452	$ (277,234)
Net loss	(2,092)			(2,092)
Issuance of common stock, net	3,136	958	3,136
Exercise of stock options	124	50	124
Share-based compensation expense	2,942		2,942
Ending Balance at Sep. 30, 2020	82,328	112,522	361,654	(279,326)
Beginning Balance at Jun. 30, 2020	78,218	111,514	355,452	(277,234)
Net loss	(13,546)
Ending Balance at Dec. 31, 2020	73,498	112,528	364,278	(290,780)
Beginning Balance at Sep. 30, 2020	82,328	112,522	361,654	(279,326)
Net loss	(11,454)			(11,454)
Exercise of stock options	15	6	15
Share-based compensation expense	2,609		2,609
Ending Balance at Dec. 31, 2020	73,498	112,528	364,278	(290,780)
Beginning Balance at Jun. 30, 2021	41,362	112,615	369,171	(327,809)
Net loss	(11,880)			(11,880)
Issuance of common stock for vested restricted stock units	(194)	63	(194)
Share-based compensation expense	2,539		2,539
Ending Balance at Sep. 30, 2021	31,827	112,678	371,516	(339,689)
Beginning Balance at Jun. 30, 2021	41,362	112,615	369,171	(327,809)
Net loss	(17,646)
Ending Balance at Dec. 31, 2021	77,250	132,905	422,705	(345,455)
Beginning Balance at Sep. 30, 2021	31,827	112,678	371,516	(339,689)
Net loss	(5,766)			(5,766)
Issuance of common stock, net	48,653	20,125	48,653
Exercise of stock options	212	102	212
Share-based compensation expense	2,324		2,324
Ending Balance at Dec. 31, 2021	$ 77,250	$ 132,905	$ 422,705	$ (345,455)