Note 8 - Income Taxes - Reconciliation of the Amount of Unrecognized Tax Benefits (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Balance as of January 1	$ 40,000	$ 40,000
Increases - current year tax positions	11,000	11,000
Increases - prior year tax positions
Settlements
Lapse of statute of limitations	(11,000)	(11,000)
Balance as of December 31	$ 40,000	$ 40,000