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Fair Value | 12 Months Ended
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Dec. 31, 2020
Fair Value Disclosures [Abstract] |
Fair Value | Note 5 - Fair Value Recurring Fair Value Measurements Our borrowing instruments are recorded at their carrying values in the balance sheets, which may differ from their respective fair values. The fair values of outstanding borrowings, which are classified as Level 2, approximate their carrying values at December 31, 2020 and 2019, based on interest rates currently available for similar borrowings and were:
|  | As of December 31, |
| 2020 |  |  | 2019 |
|  | Carrying Value |  |  | Fair Value |  |  | Carrying Value |  |  | Fair Value |
Borrowings | $ | 27,766 |  |  | $ | 27,766 |  |  | $ | 35,971 |  |  | $ | 35,971 |
The financial liabilities that are measured and recorded at estimated fair value on a recurring basis consist of our contingent consideration associated with our acquisition of Indi, and prior to the completion of our initial public offering in October 2020, the warrant liability and put option liability granted to certain holders of our convertible preferred stock and debt instruments, which were accounted for as liabilities and remeasured through our statements of operations. The table below presents the reported fair values of these liabilities, all of which are classified as Level 3 in the fair value hierarchy, as of the dates indicated (in thousands):
|  | As of December 31, |
Description |  | 2020 |  |  | 2019 |
Contingent consideration |  | $ | 29,932 |  |  | $ | 29,114 |
Put option liability |  |  | — |  |  |  | 3,261 |
Warrant liability |  |  | — |  |  |  | 372 |
Contingent value rights |  |  | — |  |  |  | 60 |
The following table presents the changes in these financial liabilities for the year ended December 31, 2020 (in thousands):
Level 3 Rollforward |  | Contingent Consideration |  |  | Put Option Liability |  |  | Warrant Liability |  |  | Contingent Value Rights |
Beginning balances |  | $ | 29,114 |  |  | $ | 3,261 |  |  | $ | 372 |  |  | $ | 60 |
Additions |  |  | — |  |  |  | 3,389 |  |  |  | — |  |  |  | — |
Changes in fair value |  |  | 818 |  |  |  | — |  |  |  | 1,252 |  |  |  | (60 | )
Reclassified to additional paid-in capital |  |  | — |  |  |  | (6,650 | ) |  |  | (1,624 | ) |  |  | — |
Ending balances |  | $ | 29,932 |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Contingent Consideration In connection with the acquisition of Indi, the Company recorded contingent consideration for amounts contingently payable to Indi's selling shareholders pursuant to the Asset Purchase Agreement (See Note 4 – Business Combinations). The significant unobservable inputs used in the measurement of fair value include the probability of successful achievement of the specified product gross margin targets, the period in which the targets are expected to be achieved, and discount rates which ranged from 12.2% to 13.5%. Significant increases or decreases in any of these inputs would result in a significantly higher or lower fair value measurement. Contingent consideration is recorded in the balance sheets as long-term liabilities. The net change to contingent consideration during the years ended December 31, 2020 and 2019 was an increase of $0.8 million and $4.1 million, respectively, and are recorded as operating expenses in the statements of operations. Put Option Liability The put option liability was valued based on the calculated returns as a result of the various discounts included in the Company’s convertible notes payable and the related probability assessments of the various settlement scenarios. During 2020, the Company recognized an addition to the put option liability of $3.4 million in connection with a favorable conversion rate granted to holders of issued convertible debt. The put option liability was settled upon the closing of the Company’s initial public offering in October 2020 and reclassified to additional paid-in capital. Warrant Liability In connection with entering into the 2018 Notes, the Company issued to the lender a warrant to purchase 613,333 shares of Series G convertible preferred stock, at an exercise price of $0.75 per share, subject to adjustment upon specified dilutive issuances. The warrant was immediately exercisable upon issuance and expires on February 23, 2028. The estimated fair value of the warrant on the issuance date of $0.3 million was recorded as a debt discount and as a preferred stock warrant liability. Through the effective date of the Company’s initial public offering, the Series G warrants were remeasured to an estimate of fair value using a Black Scholes pricing model. As a result of the Company’s initial public offering, the preferred stock warrants were automatically converted to warrants to purchase 103,326 shares of common stock with a weighted average exercise price of $4.46 and were also transferred to additional paid-in capital. During 2020, the Company recorded an increase in the value of the warrant liability of $1.3 million. Contingent Value Rights In addition to the shares of Series F Preferred Stock that were issued in January 2016, investors who purchased more than their pro‑rata amount in the financing described above received a calculated number of contingent value rights (CVRs). In connection with the Series F financing, the Company issued 3,999 CVRs originally valued at $0.5 million. One CVR represents 0.00375% of the Company’s interest in the drug ficlatuzumab. The initial estimated value of the CVRs were recorded as a liability and as a reduction to the Series F proceeds. Upon receipt by the Company or a milestone, royalty, or any other type of payment from the Company’s ownership rights in the drug, the Company was required to make a cash payment to the CVR holders equal to 15% of net proceeds, as defined. In September 2020, the Company exercised its opt-out right with AVEO Oncology (AVEO) for the payment of 50% of development and regulatory costs for ficlatuzumab. As a result, the CVRs were settled effective December 2, 2020. See Note 17 – Commitments and Contingencies for a discussion of the Co-Development Agreement with AVEO. Non-Financial Assets and Liabilities Our non-financial assets, which primarily consist of property and equipment, goodwill, and other intangible assets, are not required to be carried at fair value on a recurring basis and are reported at carrying value. There were no changes to the valuation methods during the periods presented.

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- Definition The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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