Consolidated Statement of Changes in Stockholders' Equity - USD ($) $ in Thousands	Preferred Stock [Member] Series B Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balances (in shares) at Jun. 30, 2018	59,065	56,331,147
Balances at Jun. 30, 2018		$ 56	$ 84,322	$ (79,348)	$ 5,030
Issuance of common stock pursuant to exercise of options (in shares)		56,900			56,900
Issuance of common stock pursuant to exercise of options			15		$ 15
Issuance of common stock, net (in shares)		11,000,000
Issuance of common stock, net		$ 11	7,359		7,370
Payment of dividend to preferred stockholders			(11)		(11)
Share-based compensation			420		420
Net loss				(5,144)	(5,144)
Balances (in shares) at Jun. 30, 2019	59,065	67,388,047
Balances at Jun. 30, 2019		$ 67	92,105	(84,492)	$ 7,680
Issuance of common stock pursuant to exercise of options (in shares)		262,500			262,500
Issuance of common stock pursuant to exercise of options		$ 1	130		$ 131
Issuance of common stock, net (in shares)		1,247,232
Issuance of common stock, net		$ 1	873		874
Payment of dividend to preferred stockholders			(11)		(11)
Share-based compensation			495		495
Net loss				(3,446)	(3,446)
Balances (in shares) at Jun. 30, 2020	59,065	68,897,779
Balances at Jun. 30, 2020		$ 69	93,592	(87,938)	$ 5,723
Issuance of common stock pursuant to exercise of options (in shares)		970,315			970,315
Issuance of common stock pursuant to exercise of options		$ 1	533		$ 534
Issuance of common stock, net (in shares)		59,669,230
Issuance of common stock, net		$ 60	56,315		56,375
Payment of dividend to preferred stockholders			(9)		(9)
Share-based compensation			386		386
Net loss				(3,387)	(3,387)
Conversion of preferred stock to common stock (in shares)	(59,065)	59,065
Issuance of common stock pursuant to exercise of warrants (in shares)		12,318,877
Issuance of common stock pursuant to exercise of warrants		$ 12	7,772		7,784
Balances (in shares) at Jun. 30, 2021		141,915,266
Balances at Jun. 30, 2021		$ 142	$ 158,589	$ (91,325)	$ 67,406