Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Benchmark, Increment Change

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Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Benchmark, Negative Movement Of Benchmark

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Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Benchmark, Negative Movement Of Benchmark, Percent

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Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Benchmark, Positive Movement Of Benchmark

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Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Benchmark, Positive Movement Of Benchmark, Percent

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Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Benchmark, Stock Performance Threshold

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Share-Based Compensation Arrangement By Share-Based Payment Award, Percentage Of Targeted Award

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Share-Based Compensation Arrangement By Share-based Payment Award, Offering Period

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- Definition

Present value of lessee's discounted obligation for lease payments from finance lease.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Present value of lessee's discounted obligation for lease payments from operating lease.

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Amount of lessee's right to use underlying asset under operating lease.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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The cumulative amount of the reporting entity's undistributed earnings or deficit.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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The highest percentage of annual salary that an employee is permitted to utilize with respect to the plan.

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Percentage of vesting of award under share-based payment arrangement.

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Purchase price of common stock expressed as a percentage of its fair value.

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Significant Accounting Policies and Recent Accounting Pronouncements (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 29, 2019	Sep. 29, 2019	Sep. 30, 2018	Jun. 30, 2019	Mar. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets, net	$ 32,008	$ 32,008
Operating lease liability	34,298	34,298
Total property and equipment, gross	41,903	41,903					$ 60,443
Property and equipment, net	24,216	24,216					49,428
Accumulated deficit	(151,134)	(151,134)					(45,849)
Build-to-suit lease
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property and equipment, net	0	0					$ 21,610
Accumulated deficit	$ 281	$ 281
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets, net				$ 7,200	$ 14,300	$ 14,400
Operating lease liability				$ 7,200	$ 14,300	14,400
Accounting Standards Update 2016-02 \| Build-to-suit lease
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property and equipment, net						(21,610)
Finance lease liability						(21,900)
Accumulated deficit						$ 281
RSUs \| Tranche One
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stock awards, annual vesting installments (as a percentage)		33.33%
RSUs \| Tranche Two
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stock awards, annual vesting installments (as a percentage)		33.33%
RSUs \| Tranche Three
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stock awards, annual vesting installments (as a percentage)		33.33%
RSUs \| Executive Officer
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stock awards, annual vesting installments (as a percentage)	50.00%
PSUs \| Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of shares that can be earned of targeted award (as a percentage)		50.00%
PSUs \| Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of shares that can be earned of targeted award (as a percentage)		150.00%
PSUs \| Tranche One
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stock awards, annual vesting installments (as a percentage)		33.33%
PSUs \| Tranche Two
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stock awards, annual vesting installments (as a percentage)		33.33%
PSUs \| Tranche Three
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stock awards, annual vesting installments (as a percentage)		33.33%
PSUs \| Executive Officer
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stock awards, annual vesting installments (as a percentage)	25.00%
MPSUs
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Vesting period		3 years
Positive movement of benchmark (multiplier)	3.3	3.3
Negative movement of benchmark (multiplier)	2.5	2.5
Positive movement of benchmark (as a percentage)	3.30%	3.30%
Negative movement of benchmark (as a percentage)	2.50%	2.50%
Movement of benchmark, increment (as a percentage)	1.00%	1.00%
Threshold (as a percentage)	30.00%	30.00%
MPSUs \| Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Threshold (as a percentage)	200.00%	200.00%
MPSUs \| Executive Officer
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stock awards, annual vesting installments (as a percentage)	25.00%
2018 Plan \| Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Vesting period		3 years
2018 Plan \| Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Vesting period		4 years
2018 Plan \| Stock Options
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Vesting period		4 years
2018 Plan \| Stock Options \| Tranche One
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Vesting period		3 years
2018 Plan \| RSUs \| Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Vesting period		3 years
2018 Plan \| RSUs \| Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Vesting period		4 years
2018 Stock Repurchase Program \| ESPP
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Maximum percentage of compensation contributed by employees			15.00%
ESPP purchase price of common stock, percent of market price			85.00%
Offering period (in years)		6 months