Note 7 - Indebtedness - Long-term Debt (Details) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Total long-term debt	$ 856,000	$ 1,870,000
Current installments	(856,000)	(1,011,000)
Long-term debt, excluding current installments		859,000
Loans Payable [Member]
Total long-term debt	$ 856,000	$ 1,870,000