Note J - Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
State and Local Jurisdiction [Member]
Deferred Tax Assets, Tax Credit Carryforwards	$ 1,339	$ 1,016
Tax Credit Carryforward, Amount	2,000
Foreign Tax Authority [Member]
Deferred Tax Assets, Tax Credit Carryforwards	1,914	2,060
Operating Loss Carryforwards	6,900	1,900
Tax Credit Carryforward, Amount	1,900
Deferred Tax Assets, Valuation Allowance	900	500
Domestic Tax Authority [Member]
Operating Loss Carryforwards	$ 15,200
Tax Credit Carryforward, Amount		$ 200
Internal Revenue Service (IRS) [Member] | Earliest Tax Year [Member]
Open Tax Year	2012
Internal Revenue Service (IRS) [Member] | Latest Tax Year [Member]
Open Tax Year	2015
State and Foreign Jurisdictions [Member] | Earliest Tax Year [Member]
Open Tax Year	2011
State and Foreign Jurisdictions [Member] | Latest Tax Year [Member]
Open Tax Year	2015
Operating Loss Carryforwards Expiration Term		20 years
Deferred Tax Assets, Valuation Allowance	$ 933	$ 542
Unrecognized Tax Benefits	400	702	$ 702	$ 1,091
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	300	600
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	100	$ 200
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit	$ 100