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Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2014
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:
 
2014
 
2013
 
2012
Beginning balance
$
1,705

 
$
929

 
$
623

Additions to sales allowance and bad debt expense
1,610

 
1,305

 
536

Deductions (write-offs/recoveries) from reserve
(592
)
 
(529
)
 
(230
)
Ending balance
$
2,723

 
$
1,705

 
$
929
Summary of product warranty activity
The following table summarizes product warranty activity during 2014 and 2013:
 
2014
 
2013
Beginning balance
$
1,269

 
$
814

Charges to expense
2,048

 
1,457

Costs incurred
(1,464
)
 
(1,002
)
Ending balance
$
1,853

 
$
1,269
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,
 
2014
 
2013
 
2012
Customer-funded service sales
$
3,806

 
$
10,302

 
$
5,470

Customer-funded costs included in costs of service sales
2,633

 
2,387

 
3,424
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:
 
2014
 
2013
 
2012
Weighted average common shares outstanding—basic
15,420

 
15,144

 
14,777

Dilutive common shares issuable in connection with stock plans
185

 
197

 
242

Weighted average common shares outstanding—diluted
15,605

 
15,341

 
15,019