Note 7 - Goodwill and Intangible Assets - Intangible Assets, Net (Details) - USD ($) $ in Thousands	Apr. 01, 2017	Dec. 31, 2016
Intangible assets, gross	$ 52,692	$ 52,692
Intangible assets, accumulated amortization	(13,762)	(11,831)
Intangible assets, net	38,930	40,861
Customer Relationships [Member]
Intangible assets, gross	38,801	38,801
Intangible assets, accumulated amortization	(6,732)	(5,746)
Intangible assets, net	32,069	33,055
Trade Names [Member]
Intangible assets, gross	4,185	4,185
Intangible assets, accumulated amortization	(3,249)	(2,746)
Intangible assets, net	936	1,439
Customer Lists [Member]
Intangible assets, gross	6,607	6,607
Intangible assets, accumulated amortization	(2,618)	(2,284)
Intangible assets, net	3,989	4,323
Off-Market Favorable Lease [Member]
Intangible assets, gross	553	553
Intangible assets, accumulated amortization	(109)	(158)
Intangible assets, net	444	395
Noncompete Agreements [Member]
Intangible assets, gross	2,546	2,546
Intangible assets, accumulated amortization	(1,054)	(897)
Intangible assets, net	$ 1,492	$ 1,649