Condensed Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) shares in Thousands, $ 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	(209)
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	8,079	8,079
Other comprehensive income (loss)							$ 0	$ 0	0	(110)	0	(110)
Stock compensation awards (in shares)							48	0
Stock compensation awards							$ 225	$ 0	0	0	0	225
Restricted stock units issued (in shares)							21	0
Restricted stock units issued							$ 0	$ 0	0	0	0	0
Shares issued for deferred compensation (in shares)							54	0
Shares issued for deferred compensation							$ 296	$ 0	0	0	0	296
Activity of treasury shares, net (in shares)							0	42
Activity of treasury shares, net							$ 0	$ 411	0	0	0	411
Deferred stock compensation							0	0	(413)	0	0	(413)
Stock compensation expense							$ 494	$ 0	0	0	0	494
Stock options exercised, net (in shares)							29	0
Stock options exercised, net							$ 174	$ 0	0	0	0	174
Dividends — $0.20 per share							$ 0	$ 0	0	0	(3,958)	(3,958)
Balance (in shares) at Mar. 31, 2020							26,328	(167)
Balance at Mar. 31, 2020							$ 126,918	$ (1,057)	1,055	(94)	(2,115)	124,707
Balance (in shares) at Jun. 30, 2020							26,466	(180)
Balance at Jun. 30, 2020							$ 127,713	$ (1,121)	1,121	(93)	(1,920)	125,700
Net Income							0	0	0	0	5,670	5,670
Other comprehensive income (loss)							$ 0	$ 0	0	93	0	93
Stock compensation awards (in shares)							35	0
Stock compensation awards							$ 242	$ 0	0	0	0	242
Restricted stock units issued (in shares)							28	0
Restricted stock units issued							$ 0	$ 0	0	0	0	0
Shares issued for deferred compensation (in shares)							141	0
Shares issued for deferred compensation							$ 1,096	$ 0	0	0	0	1,096
Activity of treasury shares, net (in shares)							0	(128)
Activity of treasury shares, net							$ 0	$ (990)	0	0	0	(990)
Deferred stock compensation							0	0	990	0	0	990
Stock compensation expense							$ 1,317	$ 0	0	0	0	1,317
Stock options exercised, net (in shares)							128	0
Stock options exercised, net							$ 962	$ 0	0	0	0	962
Dividends — $0.20 per share							$ 0	$ 0	0	0	(4,010)	(4,010)
Balance (in shares) at Mar. 31, 2021							26,798	(308)
Balance at Mar. 31, 2021							$ 131,330	$ (2,111)	$ 2,111	$ 0	$ (260)	$ 131,070