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Fair Value Measurements (Tables) | 9 Months Ended
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Sep. 29, 2018
Fair Value Disclosures [Abstract] |
Financial Assets and Liabilities Measured and Recognized at Fair Value on a Recurring Basis | As of September 29, 2018 and December 30, 2017, financial assets and liabilities measured and recognized at fair value on a recurring basis and classified under the appropriate level of the fair value hierarchy as described above were as follows:
|  | As of September 29, 2018 |  |  | As of December 30, 2017 |
|  | Fair Value Measurements |  |  | Fair Value Measurements |
(in thousands) |  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market funds |  | $ | 22,844 |  |  | $ | — |  |  | $ | — |  |  | $ | 22,844 |  |  | $ | 20,950 |  |  | $ | — |  |  | $ | — |  |  | $ | 20,950 |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Earn-out liability |  | $ | — |  |  | $ | — |  |  | $ | 364 |  |  | $ | 364 |  |  | $ | — |  |  | $ | — |  |  | $ | 572 |  |  | $ | 572 |
Quantitative Information about the Inputs and Valuation Methodologies Used for Fair Value Measurements | The following tables present quantitative information about the inputs and valuation methodologies used for our fair value measurements classified in Level 3 of the fair value hierarchy as of September 29, 2018 and December 30, 2017.
As of September 29, 2018 |  | Fair Value (in thousands) |  |  | Valuation Technique |  | Significant Unobservable Input |  | Weighted Average (range)
Earn-out liability |  | $ | 364 |  |  | Discounted cash flow |  | Projected royalties (in thousands) |  | $1,314
|  |  |  |  |  |  |  | Discount rate |  | 10.35% (10.20% - 27.00%)
As of December 30, 2017 |  | Fair Value (in thousands) |  |  | Valuation Technique |  | Significant Unobservable Input |  | Weighted Average (range)
Earn-out liability |  | $ | 572 |  |  | Discounted cash flow |  | Projected royalties (in thousands) |  | $1,622
|  |  |  |  |  |  |  | Discount rate |  | 10.90% (10.90% - 27.00%)
Reconciliation of the Changes in the Company's Earn-Out - Cash (Level 3 Liabilities) Balance | A reconciliation of the changes in the Company’s earn-out liability (Level 3 liability) for the nine months ended September 29, 2018 and September 30, 2017 is as follows:
|  | Nine Months Ended |
(in thousands) |  | September 29, 2018 |  |  | September 30, 2017 |
Balance as of beginning of the period |  | $ | 572 |  |  | $ | 694 |
Payments against earn-out |  |  | (302 | ) |  |  | (292 | )
Change in fair value of earn-out liability |  |  | 94 |  |  |  | 122 |
Balance as of the end of the period |  | $ | 364 |  |  | $ | 524 |

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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 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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