Note 8 - Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2018

Notes Tables

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

	Fair Value Measurement Using
	Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Fair Value Measurement
December 31, 2018
Derivative Instrument
Interest rate swap asset	$	-	$	75	$	-	$	75
December 31, 2017
Derivative Instrument
Warrant liability	$	-	$	-	$	831	$	831

Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

	Year Ended December 31,
	2018			2017
Fair value of Level 3 instrument at the beginning of the period		831			-
Issues		-			307
Settlements		(1,371	)		-
Change in fair value of warrant liability		540			524
Fair value of Level 3 instrument at the end of period	$	-		$	831