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
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]
Adjustment to opening retained earnings related to adoption of ASC Topic 842 | ASU 2016-02	0
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 shares	2,921			$ 1		2,920
Issuance of shares (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 shares	998					998
Issuance of shares (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
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
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
Net loss	(6,219)
Balance, end of period at Mar. 31, 2020	2,651			$ 190,599	(4,129)	13,868	(197,687)
Balance (in shares) at Mar. 31, 2020		281	281	7,575
Balance, beginning 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
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares	952			$ 1		951
Issuance of shares (in shares)				433
Stock-based compensation	97					97
Cancellation of restricted stock	(11)					(11)
Cancellation of restricted stock (in shares)				(11)
Forfeiture of stock options	(3)					(3)
Net loss	(2,083)						(2,083)
Balance, end of period at Dec. 31, 2019	247			$ 190,598	(4,129)	9,397	(195,619)
Balance (in shares) at Dec. 31, 2019		281	281	6,348
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares	4,377			$ 1		4,376
Issuance of shares (in shares)				1,227
Stock-based compensation	95					95
Net loss	(2,068)						(2,068)
Balance, end of period at Mar. 31, 2020	$ 2,651			$ 190,599	$ (4,129)	$ 13,868	$ (197,687)
Balance (in shares) at Mar. 31, 2020		281	281	7,575