Note 7 - Income Taxes - Net Deferred Tax Assets (Details) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Federal, state and foreign loss carryforwards	$ 1,440,000	$ 1,850,000
Deferred revenue	30,000	68,000
Deferred Tax Assets, Tax Credit Carryforwards	642,000	653,000
Other	823,000	(79,000)
Total deferred tax asset	2,935,000	2,492,000
Less valuation allowance	(2,935,000)	(2,492,000)
Net deferred tax asset