Note 5 - Intangible Assets (Details Textual) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Amortization of Intangible Assets, Total	$ 379	$ 458	$ 758	$ 917
Other Intangible Assets [Member]
Finite-Lived Intangible Asset, Useful Life			3 years
Minimum [Member] | Trademarks [Member]
Finite-Lived Intangible Asset, Useful Life			3 years
Minimum [Member] | Customer Relationships [Member]
Finite-Lived Intangible Asset, Useful Life			15 years
Maximum [Member] | Trademarks [Member]
Finite-Lived Intangible Asset, Useful Life			30 years
Maximum [Member] | Customer Relationships [Member]
Finite-Lived Intangible Asset, Useful Life			16 years