Condensed Consolidated Statement of Shareowners' Equity (unaudited) Statement - USD ($) $ in Thousands	Total	Common Stock Class A Common Stock	Common Stock Class B Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock
Balance at the beginning of the period at Jun. 30, 2020	$ 244,796	$ 10	$ 2,141	$ 3,770	$ 305,024	$ 2,137	$ (68,286)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	5,386				5,386
Other comprehensive income (loss)	31					31
Issuance of non-restricted stock (XX shares in Q1'22, 13,000 shares in Q1'21)	0			(168)			168
Compensation expense related to stock compensation plans	949			949
Restricted stock units issuance (15,000 shares in Q1'21)	(80)			(284)			204
Relative total shareholder return performance units issuance (32,000 shares YTD in Q1'21)	(156)			(586)			430
Reclassification of equity-classified awards	134				134
Dividends declared ($0.09 per share in Q1'22, $0.09 per share in Q1'21)	(3,367)				(3,367)
Balance at the end of the period at Sep. 30, 2020	247,693	10	2,141	3,681	307,177	2,168	(67,484)
Balance at the beginning of the period at Jun. 30, 2021	239,670	9	2,142	5,298	299,034	1,980	(68,793)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(5,049)				(5,049)
Other comprehensive income (loss)	(123)					(123)
Issuance of non-restricted stock (XX shares in Q1'22, 13,000 shares in Q1'21)	(3)			(120)			117
Compensation expense related to stock compensation plans	1,122			1,122
Restricted stock units issuance (15,000 shares in Q1'21)	(176)			(568)			392
Relative total shareholder return performance units issuance (32,000 shares YTD in Q1'21)	(32)			(104)			72
Repurchase of Common Stock (XXX shares in Q1'22)	(1,523)						(1,523)
Dividends declared ($0.09 per share in Q1'22, $0.09 per share in Q1'21)	(3,367)				(3,367)
Balance at the end of the period at Sep. 30, 2021	$ 230,519	$ 9	$ 2,142	$ 5,628	$ 290,618	$ 1,857	$ (69,735)