Note 13 - Term Debt - Future Contractual Maturities of Term Debt (Details)	Dec. 31, 2016 USD ($)
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal Remainder of Fiscal Year	$ 917
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Two	1,000,000
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Three	1,000,000
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Four	6,000,000
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Five
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal after Year Five	10,000,000
Long-term debt, gross	18,917,000
Senior Notes [Member]
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal Remainder of Fiscal Year	917,000
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Two	1,000,000
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Three	1,000,000
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Four	6,000,000
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Five
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal after Year Five
Long-term debt, gross	8,917,000
Subordinated Debt [Member]
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal Remainder of Fiscal Year
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Two
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Three
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Four
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Five
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal after Year Five	10,000,000
Long-term debt, gross	$ 10,000,000