Note 7 - Income Taxes - Net Operating Loss Carryforwards (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Operating Loss Carryforwards	$ 4,116	$ 5,285
Operating Loss Carryforward Expiring in 2021 [Member]
Operating Loss Carryforwards	689	689
Operating Loss Carryforward Expiring in 2022 [Member]
Operating Loss Carryforwards	849	849
Operating Loss Carryforward Expiring in 2030 [Member]
Operating Loss Carryforwards		4
Operating Loss Carryforward Expiring in 2031 [Member]
Operating Loss Carryforwards		298
Operating Loss Carryforward Expiring Thereafter [Member]
Operating Loss Carryforwards	$ 2,578	$ 3,445