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, 2018							25,884	(242)
Balance at Jun. 30, 2018					$ 591	$ 591	$ 124,104	$ (2,110)	$ 2,133		$ 15,124	$ 139,251
Net income (loss)											(17,201)	(17,201)
Other comprehensive income
Stock compensation awards (in shares)							70
Stock compensation awards							$ 265					265
Restricted stock units issued (in shares)							98
Restricted stock units issued
Shares issued for deferred compensation (in shares)							65
Shares issued for deferred compensation							$ 257					257
Activity of treasury shares, net (in shares)								19
Activity of treasury shares, net								$ 481				481
Deferred stock compensation									(474)			(474)
Stock-based compensation expense							951					951
Dividends — $0.20 per share											(3,882)	(3,882)
Balance (in shares) at Mar. 31, 2019							26,117	(223)
Balance at Mar. 31, 2019							$ 125,577	$ (1,629)	1,659		(5,368)	120,239
Balance (in shares) at Jun. 30, 2019							26,176	(209)
Balance at Jun. 30, 2019					$ (428)	$ (428)	$ 125,729	$ (1,468)	1,468	16	(5,808)	119,937
Net income (loss)											8,079	8,079
Other comprehensive income										(110)		(110)
Stock compensation awards (in shares)							48
Stock compensation awards							$ 225					225
Restricted stock units issued (in shares)							21
Restricted stock units issued
Shares issued for deferred compensation (in shares)							54
Shares issued for deferred compensation							$ 296					296
Activity of treasury shares, net (in shares)								42
Activity of treasury shares, net								$ 411				411
Deferred stock compensation									(413)			(413)
Stock-based compensation expense							494					494
Dividends — $0.20 per share											(3,958)	(3,958)
Stock options exercised, net (in shares)							29
Stock options exercised, net							$ 174					174
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