Note J - Income Taxes (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Jan. 01, 2009
Note J - Income Taxes (Details) [Line Items]
Operating Loss Carryforwards, Expiration Term	20 years
Deferred Tax Assets, Valuation Allowance	$ 542,000	$ 513,000
Deferred Tax Liabilities, Other					0
Unrecognized Tax Benefits	702,000	702,000	1,091,000	1,061,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	600,000	200,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	200,000	0.2
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit	300,000
Foreign Tax Authority [Member]
Note J - Income Taxes (Details) [Line Items]
Operating Loss Carryforwards	1,900,000	1,600,000
Tax Credit Carryforward, Amount	2,400,000
Deferred Tax Assets, Tax Credit Carryforwards	2,060,000	947,000
Deferred Tax Assets, Valuation Allowance	500,000	500,000
Domestic Tax Authority and State and Local Jurisidiction [Member]
Note J - Income Taxes (Details) [Line Items]
Operating Loss Carryforwards	14,000,000
Domestic Tax Authority [Member]
Note J - Income Taxes (Details) [Line Items]
Tax Credit Carryforward, Amount	200,000
State and Local Jurisdiction [Member]
Note J - Income Taxes (Details) [Line Items]
Tax Credit Carryforward, Amount	1,500,000
Deferred Tax Assets, Tax Credit Carryforwards	$ 1,016,000	$ 712,000
Internal Revenue Service (IRS) [Member]
Note J - Income Taxes (Details) [Line Items]
Open Tax Year Subject To Examination	2008 through 2014
State and Foreign Jurisdictions [Member]
Note J - Income Taxes (Details) [Line Items]
Open Tax Year Subject To Examination	2008 to 2014