Note 4 - Trade Accounts Receivable and Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Dec. 31, 2021	Jun. 30, 2021
Beginning	$ 311	$ 314
Additions charged to expenses	44	5
Recovered	(105)	(14)
Write-off	0	(16)
Currency translation effect	2	22
Ending	$ 252	$ 311