Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock Outstanding Class A	Common Stock Outstanding Class B	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Beginning balance at Jun. 30, 2021	$ 83,535	$ 6,475	$ 634	$ 56,507	$ 74,181	$ (54,262)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total comprehensive income	18,074				14,878	3,196
Repurchase of shares	(53)		(6)	(47)
Issuance of stock	214	7	43	164
Stock-based compensation	659	140		519
Conversion of Class B to Class A shares	0	61	(61)
Ending balance at Jun. 30, 2022	102,429	6,683	610	57,143	89,059	(51,066)
Cumulative balance:
Total	(51,066)
Total comprehensive income	26,219				23,088	3,131
Repurchase of shares	(36)		(4)	(32)
Issuance of stock	125		40	85
Stock-based compensation	730	101		629
Conversion of Class B to Class A shares	0	70	(70)
Ending balance at Jun. 30, 2023	129,467	$ 6,854	$ 576	$ 57,825	$ 112,147	(47,935)
Cumulative balance:
Currency translation loss, net of taxes						(55,840)
Pension and postretirement plans, net of taxes						7,905
Total	$ (47,935)					$ (47,935)