COMMITMENTS AND CONTINGENCIES (Tables)

12 Months Ended

Dec. 31, 2014

Commitments and Contingencies Disclosure [Abstract]

Schedule of future minimum lease payments under non-cancellable operating leases

Future minimum lease payments under non-cancelable operating leases are as follows (in thousands):

Years ending December 31,	Amount
2015	$	3,997
2016	3,190
2017	2,789
2018	2,590
2019	2,544
Thereafter	7,489
Operating lease obligations	$	22,599

Schedule of changes in warranty liability

The warranty liability is included as a component of accrued liabilities in the accompanying consolidated balance sheets. Changes in the warranty liability were as follows (in thousands): 

	Years Ended December 31,
	2014			2013			2012
Balance at beginning of year	$	1,038		$	725		$	489
Changes in existing warranty	(216		)	(41		)	47
Warranty expense	955			1,528			784
Obligations fulfilled	(974		)	(1,174		)	(595		)
Balance at end of year	$	803		$	1,038		$	725