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Note 2 - Acquisitions - Purchase Price Allocation (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Jan. 02, 2019
Dec. 31, 2018
Goodwill $ 3,264   $ 2,358
McCullough [Member]      
Accounts receivable, net   $ 461  
Inventories   586  
Property and equipment   4,138  
Goodwill   906  
Intangible assets   5,599  
Total assets acquired   11,690  
Total liabilities assumed   (690)  
Cash paid   $ 11,000