Condensed Consolidated Statement of Shareowners' Equity (unaudited) Statement - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock Class A Common Stock	Common Stock Class B Common Stock	Additional Paid-In Capital	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Income	Treasury Stock
Balance at the beginning of the period at Jun. 30, 2020	$ 244,796	$ 134	$ 10	$ 2,141	$ 3,770	$ 305,024	$ 134	$ 2,137	$ (68,286)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	4,548					4,548
Other comprehensive income (loss)	32							32
Issuance of unrestricted shares	0				(315)				315
Conversion of Class A to Class B common stock	0		(1)	1
Compensation expense related to stock compensation plans	2,258				2,258
Restricted stock units issuance	(80)				(284)				204
Relative total shareholder return performance units issuance	(156)				(586)				430
Repurchase of Common Stock	(751)								(751)
Dividends declared	(6,769)					(6,769)
Balance at the end of the period at Dec. 31, 2020	244,012		9	2,142	4,843	302,937		2,169	(68,088)
Balance at the beginning of the period at Sep. 30, 2020	247,693		10	2,141	3,681	307,177		2,168	(67,484)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(838)					(838)
Other comprehensive income (loss)	1							1
Issuance of unrestricted shares	0				(147)				147
Conversion of Class A to Class B common stock	0		(1)	1
Compensation expense related to stock compensation plans	1,309				1,309
Repurchase of Common Stock	(751)								(751)
Dividends declared	(3,402)					(3,402)
Balance at the end of the period at Dec. 31, 2020	244,012		9	2,142	4,843	302,937		2,169	(68,088)
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)	(26,363)					(26,363)
Other comprehensive income (loss)	391							391
Issuance of unrestricted shares	(3)				(242)				239
Conversion of Class A to Class B common stock	0		0	0
Compensation expense related to stock compensation plans	2,555				2,555
Restricted stock units issuance	(478)				(1,492)				1,014
Relative total shareholder return performance units issuance	(32)				(104)				72
Repurchase of Common Stock	(2,329)								(2,329)
Dividends declared	(6,747)					(6,747)
Balance at the end of the period at Dec. 31, 2021	206,664		9	2,142	6,015	265,924		2,371	(69,797)
Balance at the beginning of the period at Sep. 30, 2021	230,519		9	2,142	5,628	290,618		1,857	(69,735)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(21,314)					(21,314)
Other comprehensive income (loss)	514							514
Issuance of unrestricted shares	0				(122)				122
Conversion of Class A to Class B common stock	0		0	0
Compensation expense related to stock compensation plans	1,433				1,433
Restricted stock units issuance	(302)				(924)				622
Repurchase of Common Stock	(806)								(806)
Dividends declared	(3,380)					(3,380)
Balance at the end of the period at Dec. 31, 2021	$ 206,664		$ 9	$ 2,142	$ 6,015	$ 265,924		$ 2,371	$ (69,797)