Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 28, 2019

Accounting Policies [Abstract]

Components of available for sale securities

	December 28, 2019				December 29, 2018
	Cost		Fair Market Value		Cost		Fair Market Value
Corporate and government bonds	$	17,016	$	17,032	$	30,035	$	29,605
Convertible note	—		—		2,000		2,000
Total short term investments	$	17,016	$	17,032	$	32,035	$	31,605

Activity related to accounts receivable allowances

Activity related to accounts receivable allowances was as follows (in thousands):

	Fiscal Year Ended
	December 28, 2019			December 29, 2018			December 30, 2017
Allowance for product returns
Balance at beginning of period	$	53,920		$	42,693		$	27,673
Acquired balance	—			—			6,088
Provision	71,575			68,476			54,981
Deduction	(68,217		)	(56,164		)	(43,831		)
Other adjustments	(2,087		)	(1,085		)	(2,218		)
Balance at end of period	$	55,191		$	53,920		$	42,693
Allowance for other credits and incentives
Balance at beginning of period	$	97,737		$	61,359		$	23,658
Acquired balance	—			—			11,932
Adjustment related to adoption of ASC 606	—			1,192			—
Provision	287,891			198,371			110,605
Deduction	(247,775		)	(161,672		)	(81,269		)
Other adjustments	(3,807		)	(1,513		)	(3,567		)
Balance at end of period	$	134,046		$	97,737		$	61,359

Property and equipment

Depreciation is computed using the straight-line method over the estimated useful lives as follows:

	Estimated Useful Life
Computer and equipment	2-5 years
Furniture and fixtures	5
Machinery and tooling	2-5
Business applications software	3-7
Leasehold improvements	Lesser of economic benefit period or term of lease

Property and equipment consists of the following (in thousands):

	December 28, 2019		December 29, 2018
Computer and equipment	$	13,588	$	12,339
Furniture and fixtures	6,494		5,231
Machinery and tooling	79,213		60,281
Leasehold improvements	39,538		28,701
Business applications software	17,933		15,638
Subtotal	156,766		122,190
Less: accumulated depreciation	80,778		65,164
Property and equipment, net	$	75,988	$	57,026

Basic and diluted net income per share

The following table presents the calculation of both basic and diluted net income per share:

	Fiscal Year Ended
	December 28, 2019		December 29, 2018		December 30, 2017
Net income	$	85,300	$	87,992	$	50,964
Weighted-average shares outstanding	28,097		27,692		27,611
Dilutive effect of employee stock plans	638		948		1,142
Diluted weighted-average shares outstanding	28,735		28,640		28,753
Basic income per share	$	3.04	$	3.18	$	1.85
Diluted income per share	$	2.97	$	3.07	$	1.77