Note 8 - Fair Value Measurements - Financial Assets and Liabilities Measured on a Recurring Basis (Details) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Interest Rate Swap [Member]
Interest rate swap asset	$ 75
Warrants [Member]
Interest rate swap asset		$ 831
Fair Value, Inputs, Level 1 [Member] | Interest Rate Swap [Member]
Interest rate swap asset
Fair Value, Inputs, Level 1 [Member] | Warrants [Member]
Interest rate swap asset
Fair Value, Inputs, Level 2 [Member] | Interest Rate Swap [Member]
Interest rate swap asset	75
Fair Value, Inputs, Level 2 [Member] | Warrants [Member]
Interest rate swap asset
Fair Value, Inputs, Level 3 [Member] | Interest Rate Swap [Member]
Interest rate swap asset
Fair Value, Inputs, Level 3 [Member] | Warrants [Member]
Interest rate swap asset		$ 831