Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2018

Schedule of estimated useful lives of the related assets

Asset Classification	Estimated Useful Life
Land and buildings (under lease)		Lesser of the lease term or estimated useful life of the asset
Machinery and equipment		7 to 10 years

Schedule of components of net income per share

	Year ended December 31,
	2018		2017		2016
	(in thousands, except per share data)
Net income available to common stockholders	$	45,885	$	126,959	$	11,001
Weighted average common shares outstanding used in computing basic income per share		32,286		30,866		29,195
Incremental options and RSUs		1,716		2,570		1,752
Weighted average common shares used in computing diluted net income per share		34,002		33,436		30,947
Net income per share
Basic	$	1.42	$	4.11	$	0.38
Diluted	$	1.35	$	3.80	$	0.36

Schedule of changes in accumulated other comprehensive income, net of tax

	Foreign		Defined benefit
	currency		pension plan		Total
	(in thousands)
Balance at December 31, 2017	$	2,756	$	(580)	$	2,176
Other comprehensive income and pension reclassification		(1,794)		66		(1,728)
Balance at December 31, 2018	$	962	$	(514)	$	448

ASU 2014-09

Schedule of new accounting pronouncements and changes in accounting principles

The impact of adoption on our consolidated statement of operations for the twelve months ended December 31, 2018 and consolidated balance sheet as of December 31, 2018 was as follows (in thousands):

	Twelve months ended
	December 31, 2018
Consolidated Statement of Operations	As Reported		ASC 606 Adjustments		Pro Forma Under ASC 605
Revenue:
Product	$	415,922	$	(1,023)	$	414,899
Total revenue		442,575		(1,023)		441,552
Gross profit		179,636		(1,023)		178,613
Income from operations		59,959		(1,023)		58,936
Income before income taxes		54,705		(1,023)		53,682
Income tax provision		8,820		(165)		8,655
Net income	$	45,885	$	(858)	$	45,027
Net income per share:
Basic	$	1.42	$	(0.03)	$	1.39
Diluted	$	1.35	$	(0.03)	$	1.32

	December 31, 2018
Consolidated Balance Sheet	As Reported		ASC 606 Adjustments		Pro Forma Under ASC 605
Deferred income taxes	$	71,939	$	165	$	72,104
Total assets	$	548,441	$	165	$	548,606
Deferred revenue	$	22,584	$	2,623	$	25,207
Total current liabilities		84,997		2,623		87,620
Total liabilities		140,104		2,623		142,727
Accumulated deficit		(157,260)		(2,458)		(159,718)
Total stockholders' equity		408,337		(2,458)		405,879
Total liabilities and stockholders' equity	$	548,441	$	165	$	548,606