Note 7 - Accrued Expenses - Accrued Expenses (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Jun. 30, 2021
Customer prepayments	$ 6,333	$ 11,352
Accrued warranty	4,686	5,295
Compensation and benefits	4,649	10,051
Accrued sales commissions	1,953	2,568
Accrued FICA	1,114	1,190
Finance lease liabilities	269	263
Accrued income tax	0	434
Other accrued expenses	7,033	5,341
Total Accrued Expenses	27,483	37,918
Accrued Expenses [Member]
Operating lease liabilities	$ 1,446	$ 1,424