Condensed Consolidated Statement of Changes in Stockholders' Equity (Deficit) - USD ($) shares in Thousands, $ in Thousands	Total	Preferred Stock Series D	Common Stock	Treasury Stock Amount	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Loss
Balance, beginning of period at Jun. 30, 2020	$ 625		$ 190,599	$ (4,129)	$ 13,934	$ (199,779)
Balance (in shares) at Jun. 30, 2020		281	7,850
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock offering costs	(2)				(2)
Stock-based compensation	49				49
Restricted stock cancellation	(5)				(5)
Restricted stock cancellation (in shares)			(6)
Net loss	(2,111)					(2,111)
Balance, end of period at Sep. 30, 2020	(1,444)		$ 190,599	$ (4,129)	13,976	(201,890)
Balance (in shares) at Sep. 30, 2020		281	7,844
Balance, beginning of period at Jun. 30, 2021	61,207		$ 190,641		77,971	(207,382)	$ (23)
Balance (in shares) at Jun. 30, 2021		281	49,451
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net change in available-for-sale marketable securities	(48)						(48)
Stock-based compensation	359				359
Net loss	(2,029)					(2,029)
Balance, end of period at Sep. 30, 2021	$ 59,489		$ 190,641		$ 78,330	$ (209,411)	$ (71)
Balance (in shares) at Sep. 30, 2021		281	49,451