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Fair Value Measurements | 3 Months Ended
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Mar. 31, 2022
Fair Value Measurements |
Fair Value Measurements | Note 6. Fair Value Measurements We measure fair value based on the prices 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. Fair value measurements are based on a three-tier hierarchy that prioritizes the inputs used to measure fair value. These tiers include the following: Level 1: Quoted prices (unadjusted) in active markets for identical assets or liabilities that are accessible at the measurement date. The fair value hierarchy gives the highest priority to Level 1 inputs. Level 2: Observable prices that are based on inputs not quoted on active markets, but corroborated by market data. These inputs include quoted prices for similar assets or liabilities; quoted market prices 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. Level 3: Unobservable inputs are used when little or no market data is available. The fair value hierarchy gives the lowest priority to Level 3 inputs. In determining fair value, we utilize valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs to the extent possible, as well as consider counterparty credit risk in the assessment of fair value. We did not elect the fair value option, as allowed, to account for financial assets and liabilities that were not previously carried at fair value. Therefore, material financial assets and liabilities that are not carried at fair value, such as trade accounts receivable and payable, are reported at their historical carrying values. The fair value of the contingent consideration liability for the two acquisitions completed during the second quarter of 2021 was valued based on unobservable inputs using a Monte Carlo simulation. These inputs included the estimated amount and timing of projected future revenue, a discount rate, a risk-free rate, asset volatility and revenue volatility. Significant increases (decreases) in any of those inputs in isolation would result in a significantly higher (lower) fair value measurement. As of March 31, 2022, the contingent consideration for both acquisitions combined was determined to have an aggregate fair value of $0.7 million which is reflected as contingent consideration liability in the accompanying consolidated balance sheet as of March 31, 2022. The contingent consideration for both acquisitions, if earned, is to be paid in cash in two to four years. Certain assumptions used in estimating the fair value of the contingent consideration are uncertain by nature. Actual results may differ materially from estimates. The carrying values of our assets that are required to be measured at fair value on a recurring basis as of March 31, 2022 and 2021 approximate fair value because of our ability to immediately convert these instruments into cash with minimal expected change in value which are classified in the table below in one of the three categories of the fair value hierarchy described above (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Fair Value Measurements
​ |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
March 31, 2022 |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Cash equivalents: |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Money market mutual fund | ​ | $ | 101,801 | ​ | $ | — | ​ | $ | — | ​ | $ | 101,801
Marketable equity securities: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Mutual funds | ​ |  | 105,536 | ​ |  | — | ​ |  | — | ​ |  | 105,536
Available-for-sale debt securities: | ​ |  | ​ | ​ |  |  | ​ |  |  | ​ |  | ​
U.S. Treasury notes | ​ |  | 316,939 | ​ |  | ​ | ​ |  | ​ | ​ |  | 316,939
Corporate debt securities | ​ | ​ | 42,588 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 42,588
​ | ​ | $ | 566,864 | ​ | $ | — | ​ | $ | — | ​ | $ | 566,864
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Fair Value Measurements
​ |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
December 31, 2021 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Cash equivalents: |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Money market mutual fund | ​ | $ | 111,313 | ​ | $ | — | ​ | $ | — | ​ | $ | 111,313
Marketable equity securities: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Mutual funds | ​ |  | 110,006 | ​ |  | — | ​ |  | — | ​ |  | 110,006
Available-for-sale debt securities: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
U.S. Treasury notes | ​ | ​ | 223,896 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 223,896
Corporate debt securities | ​ |  | 155,796 | ​ |  | — | ​ |  | — | ​ |  | 155,796
​ | ​ | $ | 601,011 | ​ | $ | — | ​ | $ | — | ​ | $ | 601,011
​ Our equity securities and available-for-sale debt securities, including U.S. treasury notes and U.S. treasury bills are valued using inputs observable in active markets for identical securities and are therefore classified as Level 1 within the fair value hierarchy. We did not have any financial liabilities measured at fair value on a recurring basis as of March 31, 2022. We carry the Convertible Senior Notes (see Note 9) at face value less the unamortized discount and issuance costs on our consolidated balance sheets and present fair value for disclosure purposes only. We estimate the fair value of the Convertible Senior Notes using the net present value of the payments, discounted at an interest rate that is consistent with market and risk-adjusted interest rates, which is a Level 2 input. The following table presents the estimated fair values and the carrying values (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | March 31, 2022 | ​ | December 31, 2021
​ |  | Carrying Value |  | Fair Value |  | Carrying Value |  | Fair Value
2026 Senior Notes | ​ | $ | 390,790 | ​ | $ | 315,008 | ​ | $ | 390,523 | ​ | $ | 331,783
2025 Senior Notes | ​ | $ | 14,012 | ​ | $ | 13,155 | ​ | $ | 13,648 | ​ | $ | 13,628
​

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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=123874694&loc=d3e19207-110258 + Details
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