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Note 3 - Exit and Disposal Activities - Costs and Related Restructuring Reserves (Details) - Transition of Production from the Broadway Plant [Member]
$ in Thousands
 12 Months Ended
Dec. 31, 2016
USD ($)
Accrued, Beginning Balance $ 0
Charge 645
Cash Payments or Asset Write-Offs (218)
Accrued, Ending Balance 427
Employee Severance [Member]  
Accrued, Beginning Balance 0
Charge 427
Cash Payments or Asset Write-Offs 0
Accrued, Ending Balance 427
Asset Impairment [Member]  
Accrued, Beginning Balance 0
Charge 188
Cash Payments or Asset Write-Offs (188)
Accrued, Ending Balance 0
Equipment Relocation Costs [Member]  
Accrued, Beginning Balance 0
Charge 0
Cash Payments or Asset Write-Offs 0
Accrued, Ending Balance 0
Other Restructuring [Member]  
Accrued, Beginning Balance 0
Charge 30
Cash Payments or Asset Write-Offs (30)
Accrued, Ending Balance $ 0