Note 5 - Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Finite-lived intangible assets:
Finite-lived, Gross Carrying Amount	$ 12,580	$ 2,480
Finite-lived, Accumulated Amortization	3,276	2,115
Net Carrying Amount	9,304	365
Indefinite-lived intangible assets:
Intangible Assets, Gross Carrying Amount	19,290	2,990
Finite-lived, Accumulated Amortization	3,276	2,115
Net Carrying Amount	16,014	875
Trademarks [Member]
Indefinite-lived intangible assets:
Indefinite-lived, Gross Carrying Amount	6,710	510
Net Carrying Amount	6,710	510
Indefinite-lived, Gross Carrying Amount	6,710	510
Customer Relationships [Member]
Finite-lived intangible assets:
Finite-lived, Gross Carrying Amount	10,480	1,480
Finite-lived, Accumulated Amortization	1,828	1,328
Net Carrying Amount	8,652	152
Indefinite-lived intangible assets:
Finite-lived, Accumulated Amortization	1,828	1,328
Patented Technology [Member]
Finite-lived intangible assets:
Finite-lived, Gross Carrying Amount	600
Finite-lived, Accumulated Amortization	95
Net Carrying Amount	505
Indefinite-lived intangible assets:
Finite-lived, Accumulated Amortization	95
Patents [Member]
Finite-lived intangible assets:
Finite-lived, Gross Carrying Amount	590	590
Finite-lived, Accumulated Amortization	463	424
Net Carrying Amount	127	166
Indefinite-lived intangible assets:
Finite-lived, Accumulated Amortization	463	424
Computer Software, Intangible Asset [Member]
Finite-lived intangible assets:
Finite-lived, Gross Carrying Amount	270	270
Finite-lived, Accumulated Amortization	250	223
Net Carrying Amount	20	47
Indefinite-lived intangible assets:
Finite-lived, Accumulated Amortization	250	223
Trade Names [Member]
Finite-lived intangible assets:
Finite-lived, Gross Carrying Amount	140	140
Finite-lived, Accumulated Amortization	140	140
Net Carrying Amount
Indefinite-lived intangible assets:
Finite-lived, Accumulated Amortization	140	$ 140
Order or Production Backlog [Member]
Finite-lived intangible assets:
Finite-lived, Gross Carrying Amount	500
Finite-lived, Accumulated Amortization	500
Net Carrying Amount
Indefinite-lived intangible assets:
Finite-lived, Accumulated Amortization	$ 500