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 (loss)							0	0	0	0	4,475	4,475
Other comprehensive income (loss)							$ 0	$ 0	0	(23)	0	(23)
Stock compensation awards (in shares)							21	0
Stock compensation awards							$ 75	$ 0	0	0	0	75
Restricted stock units issued (in shares)							18	0
Restricted stock units issued							$ 0	$ 0	0	0	0	0
Shares issued for deferred compensation (in shares)							7	0
Shares issued for deferred compensation							$ 33	$ 0	0	0	0	33
Activity of treasury shares, net (in shares)							0	36
Activity of treasury shares, net							$ 0	$ 360	0	0	0	360
Deferred stock compensation							0	0	(350)	0	0	(350)
Stock compensation expense							398	0	0	0	0	398
Dividends — $0.20 per share							$ 0	$ 0	0	0	(1,319)	(1,319)
Balance (in shares) at Sep. 30, 2019							26,222	(173)
Balance at Sep. 30, 2019							$ 126,235	$ (1,108)	1,118	(7)	(3,080)	123,158
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 (loss)							0	0	0	0	1,990	1,990
Other comprehensive income (loss)							$ 0	$ 0	0	45	0	45
Stock compensation awards (in shares)							12	0
Stock compensation awards							$ 75	$ 0	0	0	0	75
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)							62	0
Shares issued for deferred compensation							$ 412	$ 0	0	0	0	412
Activity of treasury shares, net (in shares)							0	(59)
Activity of treasury shares, net							$ 0	$ (383)	0	0	0	(383)
Deferred stock compensation							0	0	383	0	0	383
Stock compensation expense							505	0	0	0	0	505
Dividends — $0.20 per share							$ 0	$ 0	0	0	(1,340)	(1,340)
Stock options exercised, net (in shares)							11	0
Stock options exercised, net							$ 53	$ 0	0	0	0	53
Balance (in shares) at Sep. 30, 2020							26,579	(239)
Balance at Sep. 30, 2020							$ 128,758	$ (1,504)	$ 1,504	$ (48)	$ (1,270)	$ 127,440