Note 1 - Summary of Significant Accounting Policies (Details Textual)		3 Months Ended
	Dec. 29, 2014	Mar. 31, 2017 USD ($) $ / shares shares	Mar. 31, 2016 USD ($)	Mar. 03, 2017 USD ($)	Jan. 03, 2017 USD ($)	Jul. 01, 2014 USD ($)
Subsidiary of Limited Liability Company or Limited Partnership, Ownership Interest		99.00%
Amortization of Intangible Assets		$ 570,000	$ 547,000
Advertising Expense		$ 17,000	10,000
Derivative, Notional Amount						$ 14,250,000
Number of Reportable Segments		3
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant | shares		3,777,362
Reclassification from APIC to Income Tax Expense [Member] | Three Months Ended March 31, 2017 [Member]
Current Period Reclassification Adjustment		$ 223,000
Reclassification from APIC to Income Tax Expense [Member] | Three Months Ended March 31, 2016 [Member]
Prior Period Reclassification Adjustment		$ 182,000
Prior Period Reclassification Adjustment, Per Share | $ / shares		$ 0.02
Stock Split from [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio	2
Interest Rate Swap [Member]
Derivative, Notional Amount		$ 18,000,000		$ 18,000,000
Interest Rate Swap [Member] | Other Current Liabilities [Member]
Derivative Liability		171,000
Foreign Exchange Contract [Member]
Derivative, Notional Amount					$ 1,800,000
Foreign Exchange Contract [Member] | Other Current Liabilities [Member]
Derivative Liability		169,000
Selling, General and Administrative Expenses [Member]
Shipping, Handling and Transportation Costs		$ 2,762,000	$ 2,655,000