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Marketable Investments | 6 Months Ended
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Jun. 30, 2018
Investments Debt And Equity Securities [Abstract] |
Marketable Investments | Note 4 — Marketable Investments The following table summarizes the Company’s marketable investments (in thousands):
|  | As of June 30, 2018 |
|  |  |  |  |  | Gross |  |  | Gross |  |  |  |  |
|  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Market |
|  | Cost |  |  | Gains |  |  | Losses |  |  | Value |
Federal agency obligations |  | $ | 1,800 |  |  | $ | — |  |  | $ | (2 | ) |  | $ | 1,798 |
Corporate obligations |  |  | 48,548 |  |  |  | — |  |  |  | (256 | ) |  |  | 48,292 |
Total |  | $ | 50,348 |  |  | $ | — |  |  | $ | (258 | ) |  | $ | 50,090 |
|  | As of December 31, 2017 |
|  |  |  |  |  | Gross |  |  | Gross |  |  |  |  |
|  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Market |
|  | Cost |  |  | Gains |  |  | Losses |  |  | Value |
Federal agency obligations |  | $ | 1,800 |  |  | $ | — |  |  | $ | (7 | ) |  | $ | 1,793 |
Corporate obligations |  |  | 52,721 |  |  |  | — |  |  |  | (181 | ) |  |  | 52,540 |
Total |  | $ | 54,521 |  |  | $ | — |  |  | $ | (188 | ) |  | $ | 54,333 |
Realized gains and losses on investments are included in earnings and are determined using the specific identification method. Realized gains and losses on the sale of the Company’s marketable investments were not material in the three and six months ended June 30, 2018 and 2017. The following table summarizes the maturity periods of the marketable investments in the Company’s portfolio as of June 30, 2018 (in thousands).
|  | FY 2018 |  |  | FY 2019 |  |  | FY2020 |  |  | Total |
Federal agency obligations |  | $ | 1,798 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,798 |
Corporate obligations |  |  | 15,753 |  |  |  | 26,772 |  |  | $ | 5,767 |  |  |  | 48,292 |
Total |  | $ | 17,551 |  |  | $ | 26,772 |  |  | $ | 5,767 |  |  | $ | 50,090 |
The following table shows the gross unrealized losses and market value of the Company’s available-for-sale securities with unrealized losses that are not deemed to be other-than-temporary, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position (in thousands):
|  | As of June 30, 2018 |
|  | Less Than 12 Months |  |  | 12 Months or Greater |
|  | Market |  |  | Unrealized |  |  | Market |  |  | Unrealized |
|  | Value |  |  | Losses |  |  | Value |  |  | Losses |
Federal agency obligations |  | $ | — |  |  | $ | — |  |  | $ | 1,798 |  |  | $ | 2 |
Corporate obligations |  |  | 40,117 |  |  |  | 217 |  |  |  | 8,175 |  |  |  | 39 |
Total |  | $ | 40,117 |  |  | $ | 217 |  |  | $ | 9,973 |  |  | $ | 41 |
|  | As of December 31, 2017 |
|  | Less Than 12 Months |  |  | 12 Months or Greater |
|  | Market |  |  | Unrealized |  |  | Market |  |  | Unrealized |
|  | Value |  |  | Losses |  |  | Value |  |  | Losses |
Federal agency obligations |  | $ | — |  |  | $ | — |  |  | $ | 1,793 |  |  | $ | 7 |
Corporate obligations |  |  | 31,723 |  |  |  | 149 |  |  |  | 20,817 |  |  |  | 32 |
Total |  | $ | 31,723 |  |  | $ | 149 |  |  | $ | 22,610 |  |  | $ | 39 |
Fair Value The Company measures certain financial assets at fair value on a recurring basis, including cash equivalents and available-for-sale securities. The fair values of these financial assets have been classified as Level 1, 2 or 3 within the fair value hierarchy as described in the accounting standards for fair value measurements. Level 1 — Fair value based on quoted prices in active markets for identical assets or liabilities. Level 2 — Fair value based on inputs other than Level 1 inputs that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities; quoted 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 — Fair value based on unobservable inputs that are supported by little or no market activity and such inputs are significant to the fair value of the assets or liabilities. The following table represents the Company’s fair value hierarchy for its financial assets (cash equivalents and investments) measured at fair value on a recurring basis (in thousands):
|  | As of June 30, 2018 |
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Money market funds (1) |  | $ | 5,253 |  |  | $ | — |  |  | $ | — |  |  | $ | 5,253 |
Federal agency obligations |  |  | — |  |  |  | 1,798 |  |  |  | — |  |  |  | 1,798 |
Corporate obligations |  |  | — |  |  |  | 48,292 |  |  |  | — |  |  |  | 48,292 |
Total |  | $ | 5,253 |  |  | $ | 50,090 |  |  | $ | — |  |  | $ | 55,343 |
|  | As of December 31, 2017 |
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Money market funds (1) |  | $ | 492 |  |  | $ | — |  |  | $ | — |  |  | $ | 492 |
Federal agency obligations |  |  | — |  |  |  | 1,793 |  |  |  | — |  |  | $ | 1,793 |
Corporate obligations |  |  | — |  |  |  | 52,540 |  |  |  | — |  |  |  | 52,540 |
Total |  | $ | 492 |  |  | $ | 54,333 |  |  | $ | — |  |  | $ | 54,825 |
(1) | Included in cash and cash equivalents.
Level 2 assets consist of the Company’s entire portfolio of marketable investments. Level 2 assets have been initially valued at the transaction price and subsequently valued, at the end of each reporting period, typically utilizing third party pricing services or other market observable data. The pricing services utilize industry standard valuation methods, including both income and market based approaches and observable market inputs to determine value. These observable market inputs include reportable trades, benchmark yields, credit spreads, broker/dealer quotes, bids, offers, current spot rates and other industry and economic events.

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