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Inventories
 6 Months Ended
Jun. 30, 2017
Inventory Disclosure [Abstract]  
Inventories

5.

Inventories

 

(Table only in thousands)

 

June 30,

2017

 

 

December 31,

2016

 

Raw materials

 

$

19,871

 

 

$

17,889

 

Work in process

 

 

2,886

 

 

 

3,986

 

Finished goods

 

 

1,269

 

 

 

1,508

 

Obsolescence allowance

 

 

(2,095

)

 

 

(1,896

)

 

 

$

21,931

 

 

$

21,487

 

 

Amounts credited to the allowance for obsolete inventory and charged to cost of sales amounted to $0.2 million and $0.6 million for the three-month periods ended June 30, 2017 and 2016, respectively, and $0.3 million and $0.8 million for the six-month periods ended June 30, 2017 and 2016, respectively.