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Note 15 - Stock Repurchase Program (Details Textual)
$ in Thousands
3 Months Ended
Oct. 02, 2015
USD ($)
shares
Mar. 31, 2019
USD ($)
shares
Mar. 31, 2018
shares
Stock Repurchase Program, Number of Shares Authorized to be Repurchased | shares 550,000    
Treasury Stock, Shares, Acquired | shares   3,800 0
Treasury Stock, Value, Acquired, Cost Method   $ 64  
ABL Credit Facility [Member]      
Unrestricted Common Stock Purchases, Maximum, Value $ 5,000    
ABL Credit Facility [Member] | Stock Repurchases Value Exceeds 5.0 Million, Option 1 [Member] | Minimum [Member]      
Line of Credit Facility Covenant Terms Percentage of Revolver Commitments 20.00%    
Balance Required for Compliance with Revolver Commitments   95,000  
ABL Credit Facility [Member] | Stock Repurchases Value Exceeds 5.0 Million, Option 2 [Member] | Minimum [Member]      
Line of Credit Facility Covenant Terms Percentage of Revolver Commitments 15.00%    
Balance Required for Compliance with Revolver Commitments   $ 71,300  
Line of Credit Facility Covenant Terms EBITDA Ratio 1