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Cash and Cash Equivalents and Investments | 3 Months Ended
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Mar. 31, 2020
Cash and Cash Equivalents and Investments [Abstract] |
Cash and Cash Equivalents and Investments | NOTE 4. CASH, CASH EQUIVALENTS AND INVESTMENTS The following tables summarize our cash, cash equivalents and investments as of March 31, 2020 and December 31, 2019 (in thousands):
| As of March 31, 2020
|  |  | Gross |  | Gross |  |
| Amortized |  | unrealized |  | unrealized |  | Fair
| Cost |  | gains |  | losses |  | Value
Cash and cash equivalents: |  |  |  |  |  |  |  |  |  |  |
Cash and money market funds | $ | 32,529 |  | $ | — |  | $ | — |  | $ | 32,529
Commercial paper |  | 36,328 |  |  | 6 |  |  | (1) |  |  | 36,333
Total cash and cash equivalents |  | 68,857 |  |  | 6 |  |  | (1) |  |  | 68,862
Investments: |  |  |  |  |  |  |  |  |  |  |
Commercial paper |  | 45,697 |  |  | 13 |  |  | — |  |  | 45,710
Corporate debt securities |  | 12,998 |  |  | — |  |  | (74) |  |  | 12,924
US government & agency securities |  | 15,009 |  |  | 86 |  |  | — |  |  | 15,095
Total investments |  | 73,704 |  |  | 99 |  |  | (74) |  |  | 73,729
Total cash, cash equivalents and investments | $ | 142,561 |  | $ | 105 |  | $ | (75) |  | $ | 142,591
Long-term restricted cash: |  |  |  |  |  |  |  |  |  |  |
Cash | $ | 4,000 |  | $ | — |  | $ | — |  | $ | 4,000
| As of December 31, 2019
|  |  | Gross |  | Gross |  |
| Amortized |  | unrealized |  | unrealized |  | Fair
| Cost |  | gains |  | losses |  | Value
Cash and cash equivalents: |  |  |  |  |  |  |  |  |  |  |
Cash and money market funds | $ | 18,644 |  | $ | — |  | $ | — |  | $ | 18,644
Commercial paper |  | 10,983 |  |  | — |  |  | — |  |  | 10,983
Total cash and cash equivalents |  | 29,627 |  |  | — |  |  | — |  |  | 29,627
Investments: |  |  |  |  |  |  |  |  |  |  |
Commercial paper |  | 16,971 |  |  | 1 |  |  | (1) |  |  | 16,971
Corporate debt securities |  | 2,496 |  |  | 5 |  |  | — |  |  | 2,501
Total investments |  | 19,467 |  |  | 6 |  |  | (1) |  |  | 19,472
Total cash, cash equivalents and investments | $ | 49,094 |  | $ | 6 |  | $ | (1) |  | $ | 49,099
Long-term restricted cash: |  |  |  |  |  |  |  |  |  |  |
Cash | $ | 4,000 |  | $ | — |  | $ | — |  | $ | 4,000
The following table summarizes the contractual maturities of our cash equivalents and available-for-sale investments, excluding money market funds, as of March 31, 2020 (in thousands):
| Fair Value
Due in one year or less | $ | 102,794
Due after one year through five years |  | 7,268
Total investments | $ | 110,062
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 of the components of cash, cash equivalents, and short-term investments. Short-term investments may include current marketable securities. + 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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