Note 1 - Summary of Accounting Policies - Changes in Allowances for Uncollectible Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Balance at beginning of year	$ 2,184	$ 1,571	$ 1,363
Acquisitions and other	66	(169)	52
Provision charged to expense	(267)	783	316
Write-offs, net of recoveries	(532)	(1)	(160)
Balance at end of year	$ 1,451	$ 2,184	$ 1,571