Note 8 - Warranties - Changes in Warranty Reserve (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Dec. 31, 2020	Jun. 30, 2020
Balance at beginning of year	$ 1,781	$ 1,911
Acquisitions and other	104	(86)
Warranty expense	1,012	1,783
Warranty claims	(1,026)	(1,827)
Balance at end of period	$ 1,871	$ 1,781