Note 7 - Accrued Expenses - Accrued Expenses (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Jun. 30, 2021
Customer prepayments	$ 8,512	$ 11,352
Compensation and benefits	5,734	10,051
Accrued warranty	5,100	5,295
Accrued sales commissions	1,347	2,568
Accrued FICA	1,200	1,190
Finance lease liabilities	266	263
Accrued income tax	0	434
Other accrued expenses	5,366	5,341
Total Accrued Expenses	28,950	37,918
Accrued Expenses [Member]
Operating lease liabilities	$ 1,425	$ 1,424