Condensed Consolidated Statement of Changes in Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Treasury Stock Amount	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Loss
Balance, beginning of period at Jun. 30, 2017	$ 16,770	$ 190,382	$ (4,121)	$ 1,483	$ (170,913)	$ (61)
Balance (in shares) at Jun. 30, 2017		4,111
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net change in available-for-sale investments	2					2
Stock-based compensation	67			67
Cancellation of restricted stock (in shares)		(2)
Share repurchases	(3)		(3)
Share repurchases (in shares)		(1)
Restricted stock issuance	55	$ 55
Net loss	(3,006)				(3,006)
Balance, end of period at Sep. 30, 2017	13,885	$ 190,437	(4,124)	1,550	(173,919)	(59)
Balance (in shares) at Sep. 30, 2017		4,108
Balance, beginning of period at Jun. 30, 2017	16,770	$ 190,382	(4,121)	1,483	(170,913)	(61)
Balance (in shares) at Jun. 30, 2017		4,111
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(8,998)
Balance, end of period at Mar. 31, 2018	8,165	$ 190,544	(4,124)	1,708	(179,911)	(52)
Balance (in shares) at Mar. 31, 2018		4,108
Balance, beginning of period at Sep. 30, 2017	13,885	$ 190,437	(4,124)	1,550	(173,919)	(59)
Balance (in shares) at Sep. 30, 2017		4,108
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net change in available-for-sale investments	(3)					(3)
Stock-based compensation	66			66
Restricted stock issuance	54	$ 54
Net loss	(3,137)				(3,137)
Balance, end of period at Dec. 31, 2017	10,865	$ 190,491	(4,124)	1,616	(177,056)	(62)
Balance (in shares) at Dec. 31, 2017		4,108
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net change in available-for-sale investments	10					10
Stock-based compensation	92			92
Restricted stock issuance	53	$ 53
Net loss	(2,855)				(2,855)
Balance, end of period at Mar. 31, 2018	8,165	$ 190,544	(4,124)	1,708	(179,911)	(52)
Balance (in shares) at Mar. 31, 2018		4,108
Balance, beginning of period at Jun. 30, 2018	3,992	$ 190,570	(4,128)	1,745	(184,164)	(31)
Balance (in shares) at Jun. 30, 2018		4,097
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net change in available-for-sale investments	31					31
Stock-based compensation	44			44
Cancellation of restricted stock	(14)	$ (14)
Cancellation of restricted stock (in shares)		(5)
Forfeiture of stock options	(3)			(3)
Exercise of stock options	7			7
Exercise of stock options (in shares)		3
Share repurchases	(1)		(1)
Restricted stock issuance	9	$ 9
Net loss	(2,238)				(2,238)
Balance, end of period at Sep. 30, 2018	1,827	$ 190,565	(4,129)	1,793	(186,402)
Balance (in shares) at Sep. 30, 2018		4,095
Balance, beginning of period at Jun. 30, 2018	3,992	$ 190,570	(4,128)	1,745	(184,164)	$ (31)
Balance (in shares) at Jun. 30, 2018		4,097
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(5,792)
Balance, end of period at Mar. 31, 2019	2,361	$ 190,648	(4,129)	5,798	(189,956)
Balance (in shares) at Mar. 31, 2019		5,777
Balance, beginning of period at Sep. 30, 2018	1,827	$ 190,565	(4,129)	1,793	(186,402)
Balance (in shares) at Sep. 30, 2018		4,095
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of stock, net of offering costs	2,921	$ 1		2,920
Issuance of stock, net of offering costs (in shares)		1,277
Stock-based compensation	45			45
Forfeiture of stock options	(1)			(1)
Restricted stock issuance	18	$ 18
Restricted stock issuance (in shares)		199
Net loss	(2,160)				(2,160)
Balance, end of period at Dec. 31, 2018	2,650	$ 190,584	(4,129)	4,757	(188,562)
Balance (in shares) at Dec. 31, 2018		5,571
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of stock, net of offering costs	998			998
Issuance of stock, net of offering costs (in shares)		206
Stock-based compensation	43			43
Restricted stock issuance	64	$ 64
Net loss	(1,394)				(1,394)
Balance, end of period at Mar. 31, 2019	$ 2,361	$ 190,648	$ (4,129)	$ 5,798	$ (189,956)
Balance (in shares) at Mar. 31, 2019		5,777