Schedule II- Valuation and Qualifying Accounts

12 Months Ended

Dec. 31, 2013

Valuation And Qualifying Accounts [Abstract]

Schedule II- Valuation and Qualifying Accounts

SCHEDULE II – VALUATION AND QUALIFYING ACCOUNTS

	Balance at		Charged to			Charged to					Balance at
	Beginning		Costs and			Other					End of
Description	of Period		Expenses			Accounts		Deductions			Period
Allowance for doubtful accounts:
Year ended December 31, 2013	$	200	$	24		$	—	$	(24	)	$	200
Year ended December 31, 2012		450		(242	)		—		(8	)		200
Year ended December 31, 2011		200		296			—		(46	)		450
Allowance for excess and obsolete inventory:
Year ended December 31, 2013	$	2,320	$	595		$	—	$	(1,916	)	$	999
Year ended December 31, 2012		4,431		554			—		(2,665	)		2,320
Year ended December 31, 2011		351		4,610			—		(530	)		4,431
Warranty reserve:
Year ended December 31, 2013	$	484	$	1,001		$	—	$	(530	)	$	955
Year ended December 31, 2012		427		527			—		(470	)		484
Year ended December 31, 2011		646		310			—		(529	)		427