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Note 14 - Business Acquisition (Details Textual) - USD ($)
$ in Thousands
9 Months Ended
Jul. 01, 2019
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Payments to Acquire Businesses, Net of Cash Acquired, Total   $ 7,246  
Long-term Debt, Total   52,987   $ 55,472
Promissory Notes [Member]        
Long-term Debt, Total   2,375  
Asset Purchase Agreement [Member]        
Payments to Acquire Businesses, Net of Cash Acquired, Total $ 7,302      
Business Acquisition, Transaction Costs   $ 448    
Asset Purchase Agreement [Member] | Promissory Notes [Member]        
Long-term Debt, Total $ 2,350