Deferred Income Tax Assets and Liabilities Details (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Jun. 30, 2022
Deferred tax assets:
Warranty reserve	$ 504	$ 1,534
Bad debt reserve	273	340
Insurance reserve	913	1,035
Net operating loss benefit and credit carryforwards	26,888	23,717
Accrued compensation and pension	964	1,051
Stock compensation expense on nonvested deferred shares	1,794	1,910
Book over tax amortization	7,218	5,449
Deferred FICA	0	1,427
Deferred Tax Liabilities, Deferred Expense, Capitalized Research and Development Costs	6,592	0
Foreign currency translation and other	1,608	1,002
Valuation allowance	(41,060)	(28,615)
Total deferred tax assets	5,694	8,850
Deferred tax liabilities:
Tax over book depreciation	5,472	7,842
Receivable holdbacks and other	248	1,034
Total deferred tax liabilities	5,720	8,876
Net deferred tax asset (liability)	(26)	$ (26)
CARES ACT deferred payroll tax liability	$ 5,600