Note 5 - Income Taxes Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Provision for income taxes at federal statutory rate	$ 1,120	$ 1,164
Provision for income taxes at federal statutory rate	34.00%	34.00%
State income taxes, net of federal benefit	$ 30	$ 37
State income taxes, net of federal benefit	0.90%	1.10%
Permanent differences	$ 28	$ (79)
Permanent differences	0.80%	(2.30%)
Federal Research and Development Credit	$ (192)
Federal Research and Development Credit	(5.80%)
Change in valuation allowance		$ (1,900)
Change in valuation allowance		(55.50%)
Return to provision	$ (51)
Return to provision	(1.50%)
Foreign tax rate differential	$ (60)	$ (161)
Foreign tax rate differential	(1.80%)	(4.70%)
Other	$ (56)	$ (9)
Other	(1.70%)	(0.30%)
Net (benefit) expense	$ 819	$ (948)
Net (benefit) expense	24.90%	(27.70%)