Note 4 - Acquisition (Details) - Fair Value of Assets Acquired and Liabilities Assumed $ in Thousands	Jun. 28, 2015 USD ($)
Assets:
Inventory	$ 434
Machinery and equipment	835
Total assets	2,934
Liabilities:
Accounts payable	434
Contingent consideration	2,500
Total liabilities	2,934
Customer Lists [Member]
Assets:
Finite-lived intangible asset	1,615
Noncompete Agreements [Member]
Assets:
Finite-lived intangible asset	$ 50