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Note 7 - Net Deferred Tax Assets (Details) - USD ($)
Dec. 31, 2015
Dec. 31, 2014
Federal, state and foreign loss carryforwards $ 1,850,000 $ 3,862,000
Capital loss carryforward   3,570,000
Deferred revenue 68,000 71,000
Deferred Tax Assets, Tax Credit Carryforwards 653,000 520,000
Other (79,000) 503,000
Total deferred tax asset 2,492,000 8,526,000
Less valuation allowance $ (2,492,000) $ (8,526,000)