Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Cumulative Effect, Period of Adoption, Adjustment [Member] Common Stock Including Additional Paid in Capital [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Treasury Stock [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Key Executive Deferred Compensation [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] AOCI Attributable to Parent [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Retained Earnings [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]	Common Stock Including Additional Paid in Capital [Member]	Treasury Stock [Member]	Key Executive Deferred Compensation [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Jun. 30, 2019							26,176,000	(209,000)
Balance at Jun. 30, 2019	$ 0	$ 0	$ 0	$ 0	$ (428)	$ (428)	$ 125,729	$ (1,468)	$ 1,468	$ 16	$ (5,808)	$ 119,937
Net income							0	0	0	0	9,592	9,592
Other comprehensive income (loss)							$ 0	$ 0	0	(109)	0	(109)
Stock compensation awards (in shares)							72,000	0
Stock compensation awards							$ 300	$ 0	0	0	0	300
Restricted stock units issued (in shares)							21,000	0
Restricted stock units issued							$ 0	$ 0	0	0	0	0
Shares issued for deferred compensation (in shares)							85,000	0
Shares issued for deferred compensation							$ 473	$ 0	0	0	0	473
Activity of treasury shares, net (in shares)							0	29,000
Activity of treasury shares, net							$ 0	$ 347	0	0	0	347
Deferred stock compensation							0	0	(347)	0	0	(347)
Stock-based compensation expense							$ 599	$ 0	0	0	0	599
Stock options exercised, net (in shares)							112,000	0
Stock options exercised, net							$ 612	$ 0	0	0		612
Dividends — $0.20 per share							$ 0	$ 0	0	0	(5,276)	(5,276)
Balance (in shares) at Jun. 30, 2020							26,466,000	(180,000)
Balance at Jun. 30, 2020							$ 127,713	$ (1,121)	1,121	(93)	(1,920)	125,700
Net income							0	0	0	0	5,868	5,868
Other comprehensive income (loss)							$ 0	$ 0	0	142	0	142
Stock compensation awards (in shares)							43,000	0
Stock compensation awards							$ 315	$ 0	0	0	0	315
Restricted stock units issued (in shares)							28,000	0
Restricted stock units issued							$ 0	$ 0	0	0	0	0
Shares issued for deferred compensation (in shares)							193,000	0
Shares issued for deferred compensation							$ 1,534	$ 0	0	0	0	1,534
Activity of treasury shares, net (in shares)							0	(166,000)
Activity of treasury shares, net							$ 0	$ (1,329)	0	0	0	(1,329)
Deferred stock compensation							0	0	1,329	0	0	1,329
Stock-based compensation expense							$ 1,977	$ 0	0	0	0	$ 1,977
Stock options exercised, net (in shares)							133,000	0				139,367
Stock options exercised, net							$ 987	$ 0	0	0	0	$ 987
Dividends — $0.20 per share							$ 0	$ 0	0	0	(5,353)	(5,353)
Balance (in shares) at Jun. 30, 2021							26,863,000	(346,000)
Balance at Jun. 30, 2021							$ 132,526	$ (2,450)	$ 2,450	$ 49	$ (1,405)	$ 131,170