Note 9 - Income Taxes - Reconciliation of Taxes on Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Tax provision computed at the federal statutory rate, amount	$ (1,534)	$ 4,959
Tax provision computed at the federal statutory rate, percent	21.00%	21.00%
Different tax rates applicable to foreign operations, amount	$ 2,978	$ 1,231
Different tax rates applicable to foreign operations, percent	(41.00%)	5.00%
Increase in (reversal of) liability for uncertain tax positions - net	$ 320	$ (822)
Increase in (reversal of) liability for uncertain tax positions - net, percent	(4.00%)	(3.00%)
Impact of U.S. Tax Reform, amount		$ (2,628)
Impact of U.S. Tax Reform, percent	0.00%	(11.00%)
Research and experimentation and foreign tax credits	$ (907)	$ (300)
Research and experimentation and foreign tax credits	12.00%	(1.00%)
State taxes, net of federal benefit, amount	$ (54)	$ 322
State taxes, net of federal benefit, percent	1.00%	1.00%
SERP/COLI and restricted stock income	$ (547)	$ 195
SERP/COLI and restricted stock income	7.00%	1.00%
Impairment of goodwill	$ 1,522
Impairment of goodwill	(21.00%)	0.00%
Other, including under/(over) accruals, unrealized foreign exchange gains and amortization of purchase accounting intangibles	$ (337)	$ (50)
Other, including under/(over) accruals, unrealized foreign exchange gains and amortization of purchase accounting intangibles	5.00%	0.00%
Tax provision computed at the Company's effective tax rate, amount	$ 1,441	$ 2,907
Tax provision computed at the Company's effective tax rate, percent	(20.00%)	12.00%