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FINANCIAL INSTRUMENTS | 6 Months Ended
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Jun. 30, 2023
Investments, All Other Investments [Abstract] |
FINANCIAL INSTRUMENTS | FINANCIAL INSTRUMENTS Fair Value of Financial Instruments Fair value is the exchange price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The fair value hierarchy established under GAAP requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The three levels of inputs that may be used to measure fair value are as follows: •Level 1: quoted prices in active markets for identical assets or liabilities; •Level 2: inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices in active markets for similar assets or liabilities, quoted prices for identical or similar assets or liabilities in markets that are not active, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities; and •Level 3: unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. We consider an active market as one in which transactions for the asset or liability occurs with sufficient frequency and volume to provide pricing information on an ongoing basis. Conversely, we view an inactive market as one in which there are few transactions for the asset or liability, the prices are not current, or price quotations vary substantially either over time or among market makers. Where appropriate, our non-performance risk, or that of our counterparty, is considered in determining the fair values of liabilities and assets, respectively. We classify our cash deposits and money market funds within Level 1 of the fair value hierarchy because they are valued using bank balances or quoted market prices. We classify our investments as Level 2 instruments based on market pricing and other observable inputs. We did not classify any of our investments within Level 3 of the fair value hierarchy. Assets and liabilities measured at fair value are classified in their entirety based on the lowest level input that is significant to the fair value measurement. Our assessment of the significance of a particular input to the entire fair value measurement requires management to make judgments and consider factors specific to the asset or liability. The carrying amount of our accounts receivable, prepaid expenses, other current assets, accounts payable, accrued expenses and other liabilities, current, approximate fair value due to their short maturities. Assets and Liabilities Measured at Fair Value on a Recurring Basis The following table sets forth the fair value of our financial assets and liabilities that were measured on a recurring basis (in thousands):
| June 30, 2023 |  | December 31, 2022
| Level 1 |  | Level 2 |  | Level 3 |  | Total |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents | $ | 93,902 |  |  | $ | 115,385 |  |  | $ | — |  |  | $ | 209,287 |  |  | $ | 137,636 |  |  | $ | 187,453 |  |  | $ | — |  |  | $ | 325,089 |
Investments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial paper | — |  |  | 94,124 |  |  | — |  |  | 94,124 |  |  | — |  |  | 127,302 |  |  | — |  |  | 127,302 |
Corporate debt securities | — |  |  | 74,584 |  |  | — |  |  | 74,584 |  |  | — |  |  | 49,491 |  |  | — |  |  | 49,491 |
U.S. government & agency securities | — |  |  | 451,867 |  |  | — |  |  | 451,867 |  |  | — |  |  | 270,436 |  |  | — |  |  | 270,436 |
Total investments | — |  |  | 620,575 |  |  | — |  |  | 620,575 |  |  | — |  |  | 447,229 |  |  | — |  |  | 447,229 |
Short-term restricted cash | 300 |  |  | — |  |  | — |  |  | 300 |  |  | 300 |  |  | — |  |  | — |  |  | 300 |
Long-term restricted cash | 2,422 |  |  | — |  |  | — |  |  | 2,422 |  |  | 2,922 |  |  | — |  |  | — |  |  | 2,922 |
Total assets measured at fair value | $ | 96,624 |  |  | $ | 735,960 |  |  | $ | — |  |  | $ | 832,584 |  |  | $ | 140,858 |  |  | $ | 634,682 |  |  | $ | — |  |  | $ | 775,540 |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent consideration | $ | — |  |  | $ | — |  |  | $ | 186,325 |  |  | $ | 186,325 |  |  | $ | — |  |  | $ | — |  |  | $ | 172,094 |  |  | $ | 172,094 |
Total liabilities measured at fair value | $ | — |  |  | $ | — |  |  | $ | 186,325 |  |  | $ | 186,325 |  |  | $ | — |  |  | $ | — |  |  | $ | 172,094 |  |  | $ | 172,094 |
We classify contingent consideration, which was incurred in connection with the acquisition of Omniome, within Level 3 as factors used to develop the estimate of fair value include unobservable inputs that are not supported by market activity and are significant to the fair value. We estimate the fair value of the contingent consideration liability by discounting the probability-weighted outcomes to present value using an estimate of our borrowing rate and the risk-free rate. The potential outcomes of milestone achievement dates are within the period from September 30, 2023 to June 30, 2024. A decrease in the probability of an earlier scenario within this range would result in a decrease in the fair value of the liability. The discount rates used are the sum of the U.S. risk-free rate and the estimated subordinated credit spread for B- and B credit rating, which ranges from 10.1% to 10.2%. Changes in our estimated subordinated credit spread can result in changes in the fair value of the contingent consideration liability, where a lower credit spread may result in an increased liability valuation. Changes in the estimated fair value of the contingent consideration liability for the six months ended June 30, 2023 were as follows (in thousands):
| Level 3
Beginning balance as of December 31, 2022 | $ | 172,094 |
Change in estimated fair value | 14,231 |
Ending balance as of June 30, 2023 | $ | 186,325 |
Changes to the fair value are recorded as change in fair value of contingent consideration in the Condensed Consolidated Statement of Operations and Comprehensive Loss. In August 2023, we commenced customer shipments of the Onso short-read sequencing instrument, with shipments of related consumables expected to occur later in August 2023. The milestone payment associated with PacBio’s acquisition of Omniome will be triggered once both the Onso instrument and related consumables have shipped to one customer. For the six months ended June 30, 2023, there were no transfers between Level 1, Level 2, or Level 3 assets or liabilities reported at fair value on a recurring basis, and our valuation techniques did not change compared to the prior year. The following tables summarize our cash, cash equivalents and investments (in thousands):
| As of June 30, 2023
| Amortized Cost |  | Gross unrealized gains |  | Gross unrealized losses |  | Fair Value
Cash and cash equivalents | 209,279 |  |  | 17 |  |  | (9) |  |  | 209,287 |
Investments: |  |  |  |  |  |  |
Commercial paper | 94,247 |  |  | — |  |  | (123) |  |  | 94,124 |
Corporate debt securities | 74,930 |  |  | 6 |  |  | (352) |  |  | 74,584 |
U.S. government & agency securities | 454,092 |  |  | 57 |  |  | (2,282) |  |  | 451,867 |
Total investments | 623,269 |  |  | 63 |  |  | (2,757) |  |  | 620,575 |
Total cash, cash equivalents and investments | $ | 832,548 |  |  | $ | 80 |  |  | $ | (2,766) |  |  | $ | 829,862 |
Short-term restricted cash | $ | 300 |  |  | $ | — |  |  | $ | — |  |  | $ | 300 |
Long-term restricted cash | $ | 2,422 |  |  | $ | — |  |  | $ | — |  |  | $ | 2,422 |
| As of December 31, 2022
| Amortized Cost |  | Gross unrealized gains |  | Gross unrealized losses |  | Fair Value
Cash and cash equivalents | 325,144 |  |  | 6 |  |  | (61) |  |  | 325,089 |
Investments: |  |  |  |  |  |  |
Commercial paper | 127,626 |  |  | 9 |  |  | (333) |  |  | 127,302 |
Corporate debt securities | 49,998 |  |  | — |  |  | (507) |  |  | 49,491 |
U.S. government & agency securities | 274,315 |  |  | 1 |  |  | (3,880) |  |  | 270,436 |
Total investments | 451,939 |  |  | 10 |  |  | (4,720) |  |  | 447,229 |
Total cash, cash equivalents and investments | $ | 777,083 |  |  | $ | 16 |  |  | $ | (4,781) |  |  | $ | 772,318 |
Short-term restricted cash | $ | 300 |  |  | $ | — |  |  | $ | — |  |  | $ | 300 |
Long-term restricted cash | $ | 2,922 |  |  | $ | — |  |  | $ | — |  |  | $ | 2,922 |
The following table summarizes the contractual maturities of our cash equivalents and available-for-sale investments, excluding money market funds, as of June 30, 2023 (in thousands):
| Fair Value
Due in one year or less | $ | 652,574 |
Due after one year through five years | 83,386 |
Total | $ | 735,960 |
Actual maturities may differ from contractual maturities because issuers may have the right to call or prepay obligations without call or prepayment penalties.

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- Definition The entire disclosure for financial instruments. This disclosure includes, but is not limited to, fair value measurements of short and long term marketable securities, international currencies forward contracts, and auction rate securities. Financial instruments may include hedging and non-hedging currency exchange instruments, derivatives, securitizations and securities available for sale at fair value. Also included are investment results, realized and unrealized gains and losses as well as impairments and risk management disclosures. + References No definition available. + Details
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