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Cash Equivalents and Marketable Securities | 3 Months Ended
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Mar. 31, 2020
Cash Equivalents and Marketable Securities |
Cash Equivalents and Marketable Securities | Note 5. Cash Equivalents and Marketable Securities Cash Equivalents and Marketable Securities Cash equivalents and marketable securities consisted of the following (in thousands):
|  | March 31, 2020
|  | Amortized |  | Gross Unrealized |  |
|  | Cost |  | Gains |  | Losses |  | Fair Value
Money market funds |  | $ | 45,644 |  | $ | — |  | $ | — |  | $ | 45,644
Commercial paper |  |  | 39,576 |  |  | 3 |  |  | (16) |  |  | 39,563
Corporate debt securities |  |  | 13,289 |  |  | 2 |  |  | (3) |  |  | 13,288
U.S. Treasury and agency securities |  |  | 17,508 |  |  | 24 |  |  | (1) |  |  | 17,531
Total cash equivalents and marketable securities |  | $ | 116,017 |  | $ | 29 |  | $ | (20) |  | $ | 116,026
Classified as: |  |  |  |  |  |  |  |  |  |  |  |
Cash equivalents |  |  |  |  |  |  |  |  |  |  | $ | 58,728
Marketable securities |  |  |  |  |  |  |  |  |  |  |  | 57,298
Total cash equivalents and marketable securities |  |  |  |  |  |  |  |  |  |  | $ | 116,026
|  | December 31, 2019
|  | Amortized |  | Gross Unrealized |  |
|  | Cost |  | Gains |  | Losses |  | Fair Value
Money market funds |  | $ | 12,964 |  | $ | — |  | $ | — |  | $ | 12,964
Commercial paper |  |  | 44,284 |  |  | 2 |  |  | (4) |  |  | 44,282
Corporate debt securities |  |  | 33,653 |  |  | 11 |  |  | (2) |  |  | 33,662
U.S. Treasury and agency securities |  |  | 40,798 |  |  | 14 |  |  | (2) |  |  | 40,810
Total cash equivalents and marketable securities |  | $ | 131,699 |  | $ | 27 |  | $ | (8) |  | $ | 131,718
Classified as: |  |  |  |  |  |  |  |  |  |  |  |
Cash equivalents |  |  |  |  |  |  |  |  |  |  | $ | 31,707
Marketable securities |  |  |  |  |  |  |  |  |  |  |  | 100,011
Total cash equivalents and marketable securities |  |  |  |  |  |  |  |  |  |  | $ | 131,718
All marketable securities held as of March 31, 2020 and December 31, 2019 had contractual maturities of less than one year. There were no material realized gains or realized losses on marketable securities for the periods presented. The Company has not experienced any material credit losses on its investments.

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- Definition The entire disclosure of cash, cash equivalents, and debt and equity securities, including any unrealized or realized gain (loss). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 + Details
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