Condensed Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Accumulated Deficit
Balance (in shares) at Jun. 30, 2017		40,331,645
Balance at Jun. 30, 2017	$ 24,468	$ 245,999	$ (221,531)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock (in shares)		9,583,332
Issuance of common stock	39,888	$ 39,888
Stock based compensation (in shares)		279,754
Stock based compensation	409	$ 409
Excess tax benefits from stock plans	67		67
Net loss	(2,171)		(2,171)
Balance (in shares) at Sep. 30, 2017		50,194,731
Balance at Sep. 30, 2017	62,661	$ 286,296	(223,635)
Balance (in shares) at Jun. 30, 2017		40,331,645
Balance at Jun. 30, 2017	24,468	$ 245,999	(221,531)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(9,588)
Balance (in shares) at Mar. 31, 2018		53,666,718
Balance at Mar. 31, 2018	79,470	$ 310,522	(231,052)
Balance (in shares) at Sep. 30, 2017		50,194,731
Balance at Sep. 30, 2017	62,661	$ 286,296	(223,635)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock (in shares)		3,423,367
Issuance of common stock	23,279	$ 23,279
Stock based compensation (in shares)		1,800
Stock based compensation	575	$ 575
Net loss	(4,194)		(4,194)
Balance (in shares) at Dec. 31, 2017		53,619,898
Balance at Dec. 31, 2017	82,321	$ 310,150	(227,829)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock based compensation (in shares)		66,421
Stock based compensation	549	$ 549
Retirement of common stock (in shares)		(19,601)
Retirement of common stock	(177)	$ (177)
Net loss	(3,223)		(3,223)
Balance (in shares) at Mar. 31, 2018		53,666,718
Balance at Mar. 31, 2018	79,470	$ 310,522	(231,052)
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	(6,320)		(6,320)
Balance (in shares) at Sep. 30, 2018		60,012,155
Balance at Sep. 30, 2018	137,114	$ 375,806	(238,692)
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	(21,487)
Balance (in shares) at Mar. 31, 2019		60,019,438
Balance at Mar. 31, 2019	122,841	$ 376,700	(253,859)
Balance (in shares) at Sep. 30, 2018		60,012,155
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)
Balance (in shares) at Dec. 31, 2018		60,013,718
Balance at Dec. 31, 2018	127,014	$ 376,363	(249,349)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock based compensation (in shares)		5,720
Stock based compensation	337	$ 337
Net loss	(4,510)		(4,510)
Balance (in shares) at Mar. 31, 2019		60,019,438
Balance at Mar. 31, 2019	$ 122,841	$ 376,700	$ (253,859)