Condensed Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Common stock equivalents	Accumulated Deficit
Beginning Balance (in shares) at Jun. 30, 2017		40,331,645
Beginning Balance at Jun. 30, 2017	$ 24,468	$ 245,999	$ (221,531)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock in relation to public offering, net of offering costs incurred (in shares)		9,583,332
Issuance of common stock in relation to public offering, net of offering costs incurred of $3,237	39,888	$ 39,888
Stock based compensation (in shares)		279,754
Stock based compensation	409	$ 409
Excess Tax Benefits From Share Based Compensation	67		67
Net loss	(2,171)		(2,171)
Ending Balance at Sep. 30, 2017	62,661	$ 286,296	(223,635)
Ending Balance (in shares) at Sep. 30, 2017		50,194,731
Beginning Balance (in shares) at Jun. 30, 2017		40,331,645
Beginning Balance at Jun. 30, 2017	24,468	$ 245,999	(221,531)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(6,365)
Ending Balance at Dec. 31, 2017	82,321	$ 310,150	(227,829)
Ending Balance (in shares) at Dec. 31, 2017		53,619,898
Beginning Balance (in shares) at Sep. 30, 2017		50,194,731
Beginning Balance at Sep. 30, 2017	62,661	$ 286,296	(223,635)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock as merger consideration (in shares)		3,423,367
Issuance of common stock as merger consideration	23,279	$ 23,279
Stock based compensation (in shares)		1,800
Stock based compensation	575	$ 575
Net loss	(4,194)		(4,194)
Ending Balance at Dec. 31, 2017	82,321	$ 310,150	(227,829)
Ending Balance (in shares) at Dec. 31, 2017		53,619,898
Beginning Balance (in shares) at Jun. 30, 2018		59,998,811
Beginning 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	(6,320)		(6,320)
Ending Balance at Sep. 30, 2018	137,114	$ 375,806	(238,692)
Ending Balance (in shares) at Sep. 30, 2018		60,012,155
Beginning Balance (in shares) at Jun. 30, 2018		59,998,811
Beginning Balance at Jun. 30, 2018	142,688	$ 375,436	(232,748)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(16,977)
Ending Balance at Dec. 31, 2018	127,014	$ 376,363	(249,349)
Ending Balance (in shares) at Dec. 31, 2018		60,013,718
Beginning Balance (in shares) at Sep. 30, 2018		60,012,155
Beginning Balance at Sep. 30, 2018	137,114	$ 375,806	(238,692)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock based compensation (in shares)		1,563
Stock based compensation	557	$ 557
Net loss	(10,657)		(10,657)
Ending Balance at Dec. 31, 2018	$ 127,014	$ 376,363	$ (249,349)
Ending Balance (in shares) at Dec. 31, 2018		60,013,718