Fair Value (Tables)

12 Months Ended

Oct. 02, 2020

Fair Value Disclosures [Abstract]

Assets and Liabilities Measured at Fair Value on Recurring Basis

Assets and liabilities measured at fair value on a recurring basis consist of the following (in thousands):

	October 2, 2020
	Fair Value		Active Markets for Identical Assets (Level 1)		Observable Inputs (Level 2)		Unobservable Inputs (Level 3)
Assets
Money market funds	$	20,139	$	20,139	$	—	$	—
Commercial paper	135,091		—		135,091		—
Corporate bonds	68,620		—		68,620		—
Total assets measured at fair value	$	223,850	$	20,139	$	203,711	$	—
Liabilities
Warrant liability	25,312		—		—		25,312
Total liabilities measured at fair value	$	25,312	$	—	$	—	$	25,312

	September 27, 2019
	Fair Value		Active Markets for Identical Assets (Level 1)		Observable Inputs (Level 2)		Unobservable Inputs (Level 3)
Assets
Money market funds	$	261	$	261	$	—	$	—
Commercial paper	71,629		—		71,629		—
Corporate bonds	29,597		—		29,597		—
Total assets measured at fair value	$	101,487	$	261	$	101,226	$	—
Liabilities
Warrant liability	12,364		—		—		12,364
Total liabilities measured at fair value	$	12,364	$	—	$	—	$	12,364

Quantitative Information Used in Fair Value Calculation of Level 3 Liabilities

The quantitative information utilized in the fair value calculation of our Level 3 liabilities are as follows:

Liabilities	Valuation Technique	Unobservable Input	October 2, 2020	September 27, 2019
Warrant liability	Black-Scholes model	Volatility	61.8%	61.4%
		Discount rate	0.09%	1.71%
		Expected life	0.2 years	1.2 years
		Exercise price	$14.05	$14.05
		Stock price	$33.80	$21.68
		Dividend rate	—%	—%

Changes in Assets with Inputs Classified within Level 3 of Fair Value

The changes in assets and liabilities with inputs classified within Level 3 of the fair value hierarchy consist of the following (in thousands): 

	Fiscal Year 2020
	September 27, 2019		Net Realized/Unrealized Losses (Gains) Included in Earnings		Purchases and Issuances		Sales and Settlements		October 2, 2020
Warrant liability	$	12,364	$	12,948	$	—	$	—	$	25,312

	Fiscal Year 2019
	September 28, 2018		Net Realized/Unrealized Losses (Gains) Included in Earnings		Purchases and Issuances		Sales and Settlements		September 27, 2019
Contingent consideration	$	585	$	65	$	—	$	(650)	$	—
Warrant liability	$	13,129	$	(765)	$	—	$	—	$	12,364

	Fiscal Year 2018
	September 29, 2017		Net Realized/Unrealized Losses (Gains) Included in Earnings		Purchases and Issuances		Sales and Settlements		September 28, 2018
Contingent consideration	$	1,679	$	(394)	$	—	$	(700)	$	585
Warrant liability	$	40,775	$	(27,646)	$	—	$	—	$	13,129

Changes in Liabilities with Inputs Classified within Level 3 of Fair Value

The changes in assets and liabilities with inputs classified within Level 3 of the fair value hierarchy consist of the following (in thousands): 

	Fiscal Year 2020
	September 27, 2019		Net Realized/Unrealized Losses (Gains) Included in Earnings		Purchases and Issuances		Sales and Settlements		October 2, 2020
Warrant liability	$	12,364	$	12,948	$	—	$	—	$	25,312

	Fiscal Year 2019
	September 28, 2018		Net Realized/Unrealized Losses (Gains) Included in Earnings		Purchases and Issuances		Sales and Settlements		September 27, 2019
Contingent consideration	$	585	$	65	$	—	$	(650)	$	—
Warrant liability	$	13,129	$	(765)	$	—	$	—	$	12,364

	Fiscal Year 2018
	September 29, 2017		Net Realized/Unrealized Losses (Gains) Included in Earnings		Purchases and Issuances		Sales and Settlements		September 28, 2018
Contingent consideration	$	1,679	$	(394)	$	—	$	(700)	$	585
Warrant liability	$	40,775	$	(27,646)	$	—	$	—	$	13,129