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Research and Development and Government and Industry Funded Contracts (Tables)
 12 Months Ended
Dec. 31, 2016
Government and Industry Funded Contracts [Abstract]  
Schedule of Government and Industry Funded Contracts
The following table shows the impact to Research and development expense amounts recognized in the Consolidated Statement of Operations:
 
 
Years Ended December 31,
(in thousands)
 
2016
 
2015
 
2014
Research and development expense
 
$
173

 
$
6,737

 
$
3,554

Less:
 
 
 
 
 
 
DOE funding
 
821

 
1,375

 
1,756

Industry cost-share funding
 
—

 
—

 
277

Research and development expense, net
 
$
(648
)
 
$
5,362

 
$
1,521