Note 1 - Summary of Significant Interim Accounting Policies (Details Textual) - USD ($)	3 Months Ended			6 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Mar. 03, 2017	Jan. 03, 2017	Jul. 01, 2014
Subsidiary of Limited Liability Company or Limited Partnership, Ownership Interest		99.00%
Amortization of Intangible Assets	$ 570,000		$ 607,000	$ 1,141,000	$ 1,154,000
Advertising Expense	$ 22,000		$ 22,000	$ 39,000	$ 32,000
Derivative, Notional Amount								$ 14,250,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	3,766,362			3,766,362
Reclassification from APIC to Income Tax Expense [Member] | Three Months Ended June 30, 2017 [Member]
Current Period Reclassification Adjustment	$ 405,000
Current Period Reclassification Adjustment, Per Share	$ 0.03
Reclassification from APIC to Income Tax Expense [Member] | Six Months Ended June 30, 2017 [Member]
Current Period Reclassification Adjustment				$ 628,000
Current Period Reclassification Adjustment, Per Share				$ 0.04
Reclassification from APIC to Income Tax Expense [Member] | Three Months Ended June 30, 2016 [Member]
Prior Period Reclassification Adjustment, Per Share			$ 0.01
Prior Period Reclassification Adjustment			$ 233,000
Reclassification from APIC to Income Tax Expense [Member] | Six Months Ended June 30, 2016 [Member]
Prior Period Reclassification Adjustment, Per Share					$ 0.03
Prior Period Reclassification Adjustment					$ 415,000
Interest Rate Swap [Member]
Derivative, Notional Amount	$ 18,000,000			$ 18,000,000		$ 18,000,000
Interest Rate Swap [Member] | Other Current Liabilities [Member]
Derivative Liability	253,000			253,000
Foreign Exchange Contract [Member]
Derivative, Notional Amount							$ 1,800,000
Foreign Exchange Contract [Member] | Other Current Liabilities [Member]
Derivative Liability	92,000			92,000
Selling, General and Administrative Expenses [Member]
Shipping, Handling and Transportation Costs	$ 2,680,000		$ 2,497,000	$ 5,441,000	$ 5,152,000