CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Treasury Stock	Additional Paid- in Capital	Retained Earnings (Accumulated Deficit)	Cumulative effect, period of adoption, adjustment	Cumulative effect, period of adoption, adjustment Retained Earnings (Accumulated Deficit)
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)	$ 338	$ 338
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	$ 165	$ (1,554)	29,020	(1,505)
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
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)	712,000	712,394
Exercise of stock options	$ 3,164	$ 7		3,157
Stock-based compensation	974			974
Issuance of restricted stock (in shares)		74,893
Issuance of restricted stock	0	$ 1		(1)
Net income (loss)	12,868				12,868
Balances (in shares) at Jun. 30, 2021		17,454,859	(295,615)
Balances at Jun. 30, 2021	$ 46,584	$ 176	$ (1,554)	$ 34,333	$ 13,629