Accrued and Other Current Liabilities (Tables)
 12 Months Ended
Dec. 31, 2015
Payables and Accruals [Abstract]  
Schedule of Accrued and Other Current Liabilities
Accrued and other current liabilities consisted of the following (in thousands):
 
As of December 31,
 
2015
 
2014
Accrued interest payable
$
5,859

 
$
5,542

Accrued employee compensation and benefits and related taxes
5,613

 
6,069

Deferred gain on sale-leaseback
1,817

 
1,760

Deferred revenue
630

 
795

Foreign currency forward contract
175

 
—

Income taxes payable
95

 
315

Accrued commissions
172

 
1,301

Other
3,467

 
3,567


$
17,828

 
$
19,349
Schedule of Cost Per Hour Liability Reserves
A summary of the CPH reserves is as follows (in thousands):
 
Years Ended December 31,
 
2014
 
2013
CPH reserve at beginning of year
$
511

 
$
3,569

Increases to reserve
—

 
747

Warranty provided or expired
(511
)
 
(3,805
)
CPH reserve at end of year
$
—

 
$
511