Note 10 - Effective Tax Rate Analysis and Reconciliation of Expected Statutory Rate (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Expected income tax provision at U.S. statutory rate	$ 878	$ 1,669
Increase (decrease) in tax from:
Current year tax credits (foreign and research)	(207)	(179)
Changes in valuation allowance	(85)	(187)
Domestic production activities deduction	(68)	(130)
Foreign income tax rate differences	(64)	(63)
Deemed dividend from foreign subsidiaries	151	208
NOL carryforwards utilized	99	93
Domestic tax expense, net of Federal benefit	33	52
Nondeductible expenses	15	$ 7
Other	(30)
Income tax expense	$ 722	$ 1,470