Note 7 - Commitments and Contingencies (Details Textual) - USD ($)
|12 Months Ended|
Dec. 31, 2016
Dec. 31, 2015
|Operating Leases, Rent Expense||$ 236,000||$ 210,000|
Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line.
No definition available.