Consolidated Statement of Changes in Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Preferred Stock Class C	Preferred Stock Class D	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 debt and marketable equity securities	30							30
Stock-based compensation	262					262
Cancellation of restricted stock (in shares)				(12)
Share repurchases	(7)				(7)
Share repurchases (in shares)				(2)
Restricted stock issuance	188			$ 188
Net loss	(13,251)						(13,251)
Balance, end 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 debt and marketable equity securities	31							31
Issuance of shares	5,908			$ 1		5,907
Issuance of shares (in shares)		281	281	1,491
Stock-based compensation	177					177
Cancellation of restricted stock	(14)			$ (14)
Cancellation of restricted stock (in shares)				(25)
Exercise of stock options	7			$ 7
Exercise of stock options (in shares)				3
Share repurchases	(1)				(1)
Restricted stock issuance	142			$ 7		135
Restricted stock issuance (in shares)				209
Net loss	(7,534)						(7,534)
Balance, end of period at Jun. 30, 2019	$ 2,708			$ 190,571	$ (4,129)	$ 7,964	$ (191,698)	$ 0
Balance (in shares) at Jun. 30, 2019		281	281	5,775