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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, 2017
USD ($)
Accrued, Beginning Balance $ 427
Charge 2,360
Cash Payments or Asset Write-Offs (2,642)
Accrued, Ending Balance 145
Employee Severance [Member]  
Accrued, Beginning Balance 427
Charge 936
Cash Payments or Asset Write-Offs (1,218)
Accrued, Ending Balance 145
Equipment Relocation Costs [Member]  
Accrued, Beginning Balance 0
Charge 1,424
Cash Payments or Asset Write-Offs (1,424)
Accrued, Ending Balance $ 0