Note 4 - Summary of Significant Accounting Policies - Allowance for Credit Loss (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Balance	$ 4,834,000	$ 4,261,000	$ 4,817,000	$ 3,987,000
Balance	1,889,000	1,580,000	1,513,000	1,559,000
Provision for/(reverse of) credit loss during the period	298,000	414,000	309,000	694,000
Provision for/(reverse of) credit loss during the period	1,000	(68)	377,000	(47,000)
Written off during the period	0	0	0	0
Written off during the period	0	0	0	0
Exchange translation adjustments	13,000	(18,000)	19,000	(24,000)
Balance	1,890,000	1,512,000	1,890,000	1,512,000
Balance as of end of the period	$ 5,145,000	$ 4,657,000	$ 5,145,000	$ 4,657,000