Note 9 - Fair Value Measurements - Assets and Liabilities Measured on a Recurring Basis (Details) - USD ($) $ in Thousands		Mar. 31, 2019	Dec. 31, 2018
Assets
Assets	[1]	$ 10,542	$ 12,668
Interest Rate Swap [Member]
Assets
Assets	[1]	7	17
Fair Value, Inputs, Level 1 [Member]
Assets
Assets	[1]	3,841	3,474
Fair Value, Inputs, Level 1 [Member] | Interest Rate Swap [Member]
Assets
Assets	[1]
Fair Value, Inputs, Level 2 [Member]
Assets
Assets	[1]	6,701	9,194
Fair Value, Inputs, Level 2 [Member] | Interest Rate Swap [Member]
Assets
Assets	[1]	7	17
Fixed Maturities [Member] | Federally Insured Certificates of Deposit [Member]
Assets
Assets		350	500
Fixed Maturities [Member] | Federally Insured Certificates of Deposit [Member] | Fair Value, Inputs, Level 1 [Member]
Assets
Assets
Fixed Maturities [Member] | Federally Insured Certificates of Deposit [Member] | Fair Value, Inputs, Level 2 [Member]
Assets
Assets		350	500
Fixed Maturities [Member] | Investment Grade Corporate Bonds [Member]
Assets
Assets		5,710	7,484
Fixed Maturities [Member] | Investment Grade Corporate Bonds [Member] | Fair Value, Inputs, Level 1 [Member]
Assets
Assets
Fixed Maturities [Member] | Investment Grade Corporate Bonds [Member] | Fair Value, Inputs, Level 2 [Member]
Assets
Assets		5,710	7,484
Fixed Maturities [Member] | Non-investment Grade Corporate Bonds [Member]
Assets
Assets		209	717
Fixed Maturities [Member] | Non-investment Grade Corporate Bonds [Member] | Fair Value, Inputs, Level 1 [Member]
Assets
Assets
Fixed Maturities [Member] | Non-investment Grade Corporate Bonds [Member] | Fair Value, Inputs, Level 2 [Member]
Assets
Assets		209	717
Short-term Investments [Member] | Money Market Funds [Member]
Assets
Assets		665	454
Short-term Investments [Member] | Fair Value, Inputs, Level 1 [Member] | Money Market Funds [Member]
Assets
Assets		665	454
Short-term Investments [Member] | Fair Value, Inputs, Level 2 [Member] | Money Market Funds [Member]
Assets
Assets
Short-term Investments [Member] | Federally Insured Certificates of Deposit [Member]
Assets
Assets		350	401
Short-term Investments [Member] | Federally Insured Certificates of Deposit [Member] | Fair Value, Inputs, Level 1 [Member]
Assets
Assets
Short-term Investments [Member] | Federally Insured Certificates of Deposit [Member] | Fair Value, Inputs, Level 2 [Member]
Assets
Assets		350	401
Deferred Compensation Investment [Member] | Equity Mutual Fund Investments [Member]
Assets
Assets	[2]	1,401	1,246
Deferred Compensation Investment [Member] | Equity Mutual Fund Investments [Member] | Fair Value, Inputs, Level 1 [Member]
Assets
Assets	[2]	1,401	1,246
Deferred Compensation Investment [Member] | Equity Mutual Fund Investments [Member] | Fair Value, Inputs, Level 2 [Member]
Assets
Assets
State Guarantee Fund Deposits [Member] | US Government Agencies Debt Securities [Member]
Assets
Assets	[1]	1,775	1,774
State Guarantee Fund Deposits [Member] | Fair Value, Inputs, Level 1 [Member] | US Government Agencies Debt Securities [Member]
Assets
Assets	[1]	1,775	1,774
State Guarantee Fund Deposits [Member] | Fair Value, Inputs, Level 2 [Member] | US Government Agencies Debt Securities [Member]
Assets
Assets
State Guarantee Fund Deposits [Member] | Federally Insured Certificates of Deposit [Member]
Assets
Assets	[1]	75	75
State Guarantee Fund Deposits [Member] | Federally Insured Certificates of Deposit [Member] | Fair Value, Inputs, Level 1 [Member]
Assets
Assets
State Guarantee Fund Deposits [Member] | Federally Insured Certificates of Deposit [Member] | Fair Value, Inputs, Level 2 [Member]
Assets
Assets	[1]	$ 75	$ 75

[1] Included in other assets

[2] Included as a trading security in other assets