Deferred Income Tax Assets and Liabilities Details (Details) - USD ($)	Jun. 30, 2022	Jun. 30, 2021
Deferred tax assets:
Warranty reserve	$ 206,000	$ 206,000
Bad debt reserve	340,000	231,000
Paid time-off accrual	315,000	747,000
Insurance reserve	1,019,000	1,229,000
Legal reserve	79,000	146,000
Net operating loss benefit and credit carryforwards	23,717,000	14,966,000
Accrued compensation and pension	736,000	690,000
Deferred Tax Assets, Tax Deferred Expense	16,000	27,000
Stock compensation expense on nonvested deferred shares	1,910,000	1,895,000
Accrued losses	1,089,000	64,000
Restructuring reserve	160,000	725,000
Book over tax amortization	5,449,000	3,765,000
Deferred FICA	1,427,000	1,920,000
Foreign currency translation and other	1,002,000	665,000
Valuation allowance	(28,615,000)	(11,104,000)
Total deferred tax assets	8,850,000	16,172,000
Deferred tax liabilities:
Tax over book depreciation	7,842,000	10,315,000
Receivable holdbacks and other	1,034,000	596,000
Total deferred tax liabilities	8,876,000	10,911,000
Net deferred tax asset (liability)	$ (26,000)	$ 5,261,000