Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2016

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:

	2016			2015			2014
Beginning balance	$	3,534		$	2,723		$	1,705
Additions	872			1,342			1,610
Deductions (write-offs/recoveries) from reserve	(929		)	(531		)	(592		)
Ending balance	$	3,477		$	3,534		$	2,723

Summary of product warranty activity

The following table summarizes product warranty activity during 2016 and 2015:

	2016			2015
Beginning balance	$	1,880		$	1,853
Charges to expense	1,723			1,431
Costs incurred	(1,323		)	(1,404		)
Ending balance	$	2,280		$	1,880

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,
	2016		2015		2014
Customer-funded service sales	$	1,400	$	3,002	$	3,806
Customer-funded costs included in costs of service sales	498		1,546		2,633

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:

	2016	2015	2014
Weighted average common shares outstanding—basic	15,834	15,625	15,420
Dilutive common shares issuable in connection with stock plans	—	209	185
Weighted average common shares outstanding—diluted	15,834	15,834	15,605