Condensed 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, 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
Adjustment to opening retained earnings related to adoption of ASC Topic 842 | ASU 2016-02	0
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, 2019	2,708			$ 190,571	(4,129)	7,964	(191,698)
Balance (in shares) at Jun. 30, 2019		281	281	5,775
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adjustment to opening retained earnings related to adoption of ASC Topic 842 | ASU 2016-02	230						230
Issuance of shares	321					321
Issuance of shares (in shares)				146
Stock-based compensation	78					78
Restricted stock issuance	26			$ 26
Restricted stock issuance (in shares)				5
Net loss	(2,068)						(2,068)
Balance, end of period at Sep. 30, 2019	$ 1,295			$ 190,597	$ (4,129)	$ 8,363	$ (193,536)
Balance (in shares) at Sep. 30, 2019		281	281	5,926