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Fair Value (Tables) | 12 Months Ended
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Sep. 27, 2019
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):
| 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 |
| September 28, 2018
| Fair Value |  | Active Markets for Identical Assets (Level 1) |  | Observable Inputs (Level 2) |  | Unobservable Inputs (Level 3)
Assets |  |  |  |  |  |  |
Money market funds | $ | 253 |  |  | $ | 253 |  |  | $ | — |  |  | $ | — |
Commercial paper | 69,950 |  |  | — |  |  | 69,950 |  |  | — |
Corporate bonds | 28,271 |  |  | — |  |  | 28,271 |  |  | — |
Total assets measured at fair value | $ | 98,474 |  |  | $ | 253 |  |  | $ | 98,221 |  |  | $ | — |
Liabilities |  |  |  |  |  |  |
Contingent consideration | $ | 585 |  |  | $ | — |  |  | $ | — |  |  | $ | 585 |
Warrant liability | 13,129 |  |  | — |  |  | — |  |  | 13,129 |
Total liabilities measured at fair value | $ | 13,714 |  |  | $ | — |  |  | $ | — |  |  | $ | 13,714 |
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 |  | September 27, 2019 |  | September 28, 2018
Contingent consideration | Discounted cash flow |  | Discount rate |  | N/A |  | 9.2%
|  |  | Probability of achievement |  | N/A |  | 90%
|  |  | Timing of cash flows |  | N/A |  | 1 month
Warrant liability | Black-Scholes model |  | Volatility |  | 61.4% |  | 60.7%
|  |  | Discount rate |  | 1.71% |  | 2.81%
|  |  | Expected life |  | 1.2 years |  | 2.2 years
|  |  | Exercise price |  | $14.05 |  | $14.05
|  |  | Stock price |  | $21.68 |  | $20.60
|  |  | 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 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 |
| Fiscal Year 2017
| September 30, 2016 |  | Net Realized/Unrealized Losses (Gains) Included in Earnings |  | Purchases and Issuances |  | Sales and Settlements |  | September 29, 2017
Contingent consideration | $ | 848 |  |  | $ | 180 |  |  | $ | 1,701 |  |  | $ | (1,050 | ) |  | $ | 1,679 |
Warrant liability | $ | 38,253 |  |  | $ | 2,522 |  |  | $ | — |  |  | $ | — |  |  | $ | 40,775 |
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 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 |
| Fiscal Year 2017
| September 30, 2016 |  | Net Realized/Unrealized Losses (Gains) Included in Earnings |  | Purchases and Issuances |  | Sales and Settlements |  | September 29, 2017
Contingent consideration | $ | 848 |  |  | $ | 180 |  |  | $ | 1,701 |  |  | $ | (1,050 | ) |  | $ | 1,679 |
Warrant liability | $ | 38,253 |  |  | $ | 2,522 |  |  | $ | — |  |  | $ | — |  |  | $ | 40,775 |

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- Definition Tabular disclosure of input and valuation technique used to measure fair value and change in valuation approach and technique for each separate class of asset and liability measured on recurring and nonrecurring basis. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income (loss), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19279-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income (loss) and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs) by class of liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19279-110258 + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19190-110258 + Details
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