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Supplemental Cash Flow Information (Tables)
 12 Months Ended
Dec. 31, 2015
Supplemental Cash Flow Elements [Abstract]  
Supplemental Cash Flow Information
The supplemental cash flow information consists of the following (in thousands):
 
 
Year Ended
 
December 31,
 
2015
 
2014
 
2013
Cash paid for interest
$
13

 
$
—

 
$
—

Cash paid for income taxes
$
38

 
$
285

 
$
188

Non-cash investing and financing activities:
 
 
 
 
 
Assets acquired under capital leases
$
—

 
$
(382
)
 
$
—

Accounts payable and accrued liabilities related to property, plant and equipment purchases
$
843

 
$
106

 
$
14