Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2013

Accounting Policies [Abstract]

Schedule of accounts, notes, loans and financing receivable

Activity within the Company’s allowance for doubtful accounts for the periods presented is as follows:

	2013			2012			2011
Beginning balance	$	929		$	623		$	592
Additions to sales allowance and bad debt expense	1,305			536			276
Deductions (write-offs/recoveries) from reserve	(529		)	(230		)	(245		)
Ending balance	$	1,705		$	929		$	623

Summary of product warranty activity

The following table summarizes product warranty activity during 2013 and 2012:

	2013			2012
Beginning balance	$	814		$	933
Charges to expense	1,457			419
Costs incurred	(1,002		)	(538		)
Ending balance	$	1,269		$	814

Revenue and related development costs, customer-funded research and development costs

Revenue and related development costs from customer-funded research and development are as follows:

	Year Ended December 31,
	2013		2012		2011
Customer-funded service sales	$	10,302	$	5,470	$	1,061
Customer-funded costs included in costs of service sales	2,387		3,424		412

Schedule of reconciliation of basic and diluted weighted average common shares outstanding

A reconciliation of the basic and diluted weighted average common shares outstanding is as follows:

	2013	2012	2011
Weighted average common shares outstanding—basic	15,144	14,777	14,768
Dilutive common shares issuable in connection with stock plans	197	242	304
Weighted average common shares outstanding—diluted	15,341	15,019	15,072