Condensed Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Accumulated Deficit
Balance (in shares) at Jun. 30, 2018		59,998,811
Balance at Jun. 30, 2018	$ 142,688	$ 375,436	$ (232,748)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock based compensation (in shares)		13,344
Stock based compensation	370	$ 370
Net loss	(5,288)		(5,288)
Balance (in shares) at Sep. 30, 2018		60,012,155
Balance at Sep. 30, 2018	137,970	$ 375,806	(237,836)
Balance (in shares) at Jun. 30, 2018		59,998,811
Balance at Jun. 30, 2018	142,688	$ 375,436	(232,748)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(20,032)
Balance (in shares) at Mar. 31, 2019		60,019,438
Balance at Mar. 31, 2019	124,120	$ 376,700	(252,580)
Balance (in shares) at Sep. 30, 2018		60,012,155
Balance at Sep. 30, 2018	137,970	$ 375,806	(237,836)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock based compensation (in shares)		1,563
Stock based compensation	557	$ 557
Net loss	(10,438)		(10,438)
Balance (in shares) at Dec. 31, 2018		60,013,718
Balance at Dec. 31, 2018	128,089	$ 376,363	(248,274)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock based compensation (in shares)		5,720
Stock based compensation	337	$ 337
Net loss	(4,306)		(4,306)
Balance (in shares) at Mar. 31, 2019		60,019,438
Balance at Mar. 31, 2019	124,120	$ 376,700	(252,580)
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 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 (in shares)		3,800,000
Issuance of common stock in relation to private placement, net of offering costs incurred of $1,102	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)