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
Shareowners’ Equity at Jun. 30, 2019	$ 216,490	$ 12	$ 2,139	$ 3,570	$ 277,391	$ 1,937	$ (68,559)
Net income	11,384				11,384
Other Comprehensive Income (Loss), Net of Tax	39					39
Issuance of non-restricted stock (13,000 shares in Q1'21, 9,000 shares in Q1'20)	0			(118)			118
Conversion of Class A to Class B common stock (0 shares in Q1'21, 2,000 shares in Q1'20)	0	0	0
Compensation expense related to stock incentive plans	2,011			2,011
Performance share issuance (0 shares in Q1'21, 67,000 shares in Q1'20)	(512)			(1,391)			879
Relative total shareholder return performance units issuance (32,000 shares in Q1'21, 48,000 shares in Q1'20)	(330)			(954)			624
Reclassification of equity-classified awards	(680)			(680)
Dividends declared ($0.09 per share in Q1'21, $0.09 per share in Q1'20)	(3,370)				(3,370)
Shareowners’ Equity at Sep. 30, 2019	225,032	12	2,139	2,438	285,405	1,976	(66,938)
Shareowners’ Equity at Jun. 30, 2020	244,796	10	2,141	3,770	305,024	2,137	(68,286)
Net income	5,386				5,386
Other Comprehensive Income (Loss), Net of Tax	31					31
Issuance of non-restricted stock (13,000 shares in Q1'21, 9,000 shares in Q1'20)	0			(168)			168
Compensation expense related to stock incentive plans	949			949
Restricted stock units issuance (15,000 shares in Q1'21, 0 shares in Q1'20)	(80)			(284)			204
Relative total shareholder return performance units issuance (32,000 shares in Q1'21, 48,000 shares in Q1'20)	(156)			(586)			430
Cumulative effect of change in accounting principle	134				134
Dividends declared ($0.09 per share in Q1'21, $0.09 per share in Q1'20)	(3,367)				(3,367)
Shareowners’ Equity at Sep. 30, 2020	$ 247,693	$ 10	$ 2,141	$ 3,681	$ 307,177	$ 2,168	$ (67,484)