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Acquisition (Tables)
6 Months Ended
Jun. 30, 2018
Business Combinations [Abstract]  
Schedule of Acquisition
 
Estimated Allocation as of March 31, 2018
 
Revision
 
Final Allocation
 
(in thousands)
Accounts receivable
$
1,073

 
$
9

 
$
1,082

Inventories
1,442

 
(62
)
 
1,380

Property, plant and equipment
133

 
207

 
340

Intellectual property

 
700

 
700

Goodwill
3,677

 
(448
)
 
3,229

Assumed current liabilities
(325
)
 
(29
)
 
(354
)
     Consideration paid
$
6,000

 
$
377

 
$
6,377