Note 17 - Pension Plan - Change in Benefit Obligation and Plan Assets (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Benefit obligation at beginning of year	$ 4,412,000	$ 3,969,000
Service cost	0	0
Interest cost	42,000	52,000
Actuarial (gain) loss	(391,000)	113,000
Effect of exchange rate changes	(309,000)	370,000
Effect of curtailment	0	0
Benefits paid	(89,000)	(92,000)
Benefit obligation at end of year	3,665,000	4,412,000
Fair value at beginning of year	1,881,000	1,713,000
Return on plan assets	24,000	92,000
Defined Benefit Plan, Plan Assets, Contributions by Employer	10,000	10,000
Benefits paid	(89,000)	(92,000)
Effect of rate changes	(137,000)	158,000
Fair value at end of year	1,689,000	1,881,000
Funded status	(1,976,000)	(2,531,000)
Unrecognized actuarial loss (gain)	1,361,000	1,702,000
Unrecognized prior service (benefit) cost	0	0
Additional minimum liability	(1,361,000)	(1,702,000)
Unrecognized transition (asset) liability	0	0
Net amount recognized	(1,976,000)	(2,531,000)
Expected return on plan assets	(57,000)	(55,000)
Amortization of prior service costs	0	0
Amortization of actuarial loss	118,000	117,000
Net periodic benefit costs	$ 103,000	$ 114,000