Note 8 - Fair Value Measurements - Financial Assets and Liabilities Measured on a Recurring Basis (Details) - Fair Value, Recurring [Member] - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
	$ 951	$ 931
Interest Rate Swap [Member]
Interest rate swap asset	31	75
Earn Out Payment Liability [Member]
Derivative liabilities	44	44
Indemnity Holdback Payment Liability [Member]
Derivative liabilities	907	887
Fair Value, Inputs, Level 1 [Member]
Fair Value, Inputs, Level 1 [Member] | Interest Rate Swap [Member]
Interest rate swap asset
Fair Value, Inputs, Level 1 [Member] | Earn Out Payment Liability [Member]
Derivative liabilities
Fair Value, Inputs, Level 1 [Member] | Indemnity Holdback Payment Liability [Member]
Derivative liabilities
Fair Value, Inputs, Level 2 [Member]
Fair Value, Inputs, Level 2 [Member] | Interest Rate Swap [Member]
Interest rate swap asset	31	75
Fair Value, Inputs, Level 2 [Member] | Earn Out Payment Liability [Member]
Derivative liabilities
Fair Value, Inputs, Level 2 [Member] | Indemnity Holdback Payment Liability [Member]
Derivative liabilities
Fair Value, Inputs, Level 3 [Member]
	951	931
Fair Value, Inputs, Level 3 [Member] | Interest Rate Swap [Member]
Interest rate swap asset
Fair Value, Inputs, Level 3 [Member] | Earn Out Payment Liability [Member]
Derivative liabilities	44	44
Fair Value, Inputs, Level 3 [Member] | Indemnity Holdback Payment Liability [Member]
Derivative liabilities	$ 907	$ 887