Condensed Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Impact of adoption of ASC 326	Common Stock	Accumulated Deficit	Accumulated Deficit Impact of adoption of ASC 326
Balance (in shares) at Jun. 30, 2019			60,008,481
Balance at Jun. 30, 2019	$ 114,423		$ 376,853	$ (262,430)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock based compensation	290		$ 290
Net loss	(11,508)			(11,508)
Balance (in shares) at Sep. 30, 2019			60,008,481
Balance at Sep. 30, 2019	103,205		$ 377,143	(273,938)
Balance (in shares) at Jun. 30, 2019			60,008,481
Balance at Jun. 30, 2019	114,423		$ 376,853	(262,430)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(29,181)
Balance (in shares) at Mar. 31, 2020			64,448,957
Balance at Mar. 31, 2020	104,433		$ 396,044	(291,611)
Balance (in shares) at Jun. 30, 2019			60,008,481
Balance at Jun. 30, 2019	$ 114,423		$ 376,853	(262,430)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201613Member
Balance (in shares) at Jun. 30, 2020			65,196,882
Balance at Jun. 30, 2020	$ 98,215	$ 348	$ 401,240	(303,025)	$ 348
Balance (in shares) at Sep. 30, 2019			60,008,481
Balance at Sep. 30, 2019	103,205		$ 377,143	(273,938)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
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
Stock based compensation (in shares)			362,941
Stock based compensation	1,742		$ 1,742
Net loss	(8,378)			(8,378)
Balance (in shares) at Dec. 31, 2019			64,171,422
Balance at Dec. 31, 2019	113,346		$ 395,662	(282,316)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock based compensation (in shares)			277,535
Stock based compensation	382		$ 382
Net loss	(9,295)			(9,295)
Balance (in shares) at Mar. 31, 2020			64,448,957
Balance at Mar. 31, 2020	104,433		$ 396,044	(291,611)
Balance (in shares) at Jun. 30, 2020			65,196,882
Balance at Jun. 30, 2020	98,215	348	$ 401,240	(303,025)	348
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock based compensation (in shares)			56,083
Stock based compensation	1,502		$ 1,502
Net loss	(6,613)			(6,613)
Balance (in shares) at Sep. 30, 2020			65,252,965
Balance at Sep. 30, 2020	93,452		$ 402,742	(309,290)
Balance (in shares) at Jun. 30, 2020			65,196,882
Balance at Jun. 30, 2020	98,215	$ 348	$ 401,240	(303,025)	$ 348
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(11,363)
Balance (in shares) at Mar. 31, 2021			71,081,313
Balance at Mar. 31, 2021	146,019		$ 460,059	(314,040)
Balance (in shares) at Sep. 30, 2020			65,252,965
Balance at Sep. 30, 2020	93,452		$ 402,742	(309,290)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock based compensation (in shares)			32,709
Stock based compensation	1,691		$ 1,691
Net loss	(2,902)			(2,902)
Balance (in shares) at Dec. 31, 2020			65,285,674
Balance at Dec. 31, 2020	92,241		$ 404,433	(312,192)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
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	$ 52,410		$ 52,410
Exercise of warrants (in shares)	12,154
Stock based compensation (in shares)			53,485
Stock based compensation	$ 3,216		$ 3,216
Net loss	(1,848)			(1,848)
Balance (in shares) at Mar. 31, 2021			71,081,313
Balance at Mar. 31, 2021	$ 146,019		$ 460,059	$ (314,040)