CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Cumulative effect, period of adoption, adjustment	Common Stock	Treasury Stock	Additional Paid- in Capital	Retained Earnings (Accumulated Deficit)	Retained Earnings (Accumulated Deficit) Cumulative effect, period of adoption, adjustment
Balances (in shares) at Jun. 30, 2017			16,304,027	295,615
Balances at Jun. 30, 2017	$ 25,287		$ 163	$ (1,554)	$ 28,063	$ (1,385)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)	0
Exercise of stock options	$ 0
Stock-based compensation	$ 476				476
Issuance of common shares for lease (in shares)	20,617		20,617
Issuance of common shares for lease	$ 83				83
Issuance of restricted stock (in shares)			52,992
Issuance of restricted stock	0		$ 1		(1)
Net income (loss)	(672)					(672)
Balances (in shares) at Jun. 30, 2018			16,377,636	295,615
Balances at Jun. 30, 2018	$ 25,174		$ 164	$ (1,554)	28,621	(2,057)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)	0
Exercise of stock options	$ 0
Stock-based compensation	400				400
Issuance of restricted stock (in shares)			55,492
Issuance of restricted stock	0		$ 1		(1)
Net income (loss)	214					214
Balances (in shares) at Jun. 30, 2019			16,433,128	295,615
Balances at Jun. 30, 2019	$ 26,126	$ 338	$ 165	$ (1,554)	29,020	(1,505)	$ 338
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)	154,000		154,444
Exercise of stock options	$ 668		$ 2		666
Stock-based compensation	518				518
Issuance of restricted stock (in shares)			80,000
Issuance of restricted stock	0		$ 1		(1)
Net income (loss)	2,266					2,266
Balances (in shares) at Jun. 30, 2020			16,667,572	295,615
Balances at Jun. 30, 2020	$ 29,578		$ 168	$ (1,554)	$ 30,203	$ 761