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Cash, Cash Equivalents and Marketable Securities | 12 Months Ended
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Dec. 31, 2022
Cash and Cash Equivalents [Abstract] |
Cash, Cash Equivalents and Marketable Securities | Cash, Cash Equivalents and Marketable Securities Cash, cash equivalents and marketable securities consisted of the following (in thousands):
|  | December 31,
|  | 2022 |  | 2021
Cash and cash equivalents: |  |  |  |
Cash |  | $ | 39,189 |  |  | $ | 26,442 |
Commercial paper |  | 33,199 |  |  | 21,582 |
U.S. government securities |  | 5,990 |  |  | — |
Money market funds |  | 555 |  |  | 2,320 |
Corporate debt securities |  | 140 |  |  | 989 |
Total cash and cash equivalents |  | 79,073 |  |  | 51,333 |
Marketable securities: |  |  |  |
U.S. government securities |  | 106,750 |  |  | 60,279 |
Commercial paper |  | 28,992 |  |  | 80,812 |
U.S. government agency securities |  | 23,632 |  |  | 5,527 |
Corporate debt securities |  | 3,168 |  |  | 3,576 |
Municipal securities |  | 100 |  |  | 2,808 |
Total marketable securities |  | 162,642 |  |  | 153,002 |
|  | $ | 241,715 |  |  | $ | 204,335 |
The carrying amounts of the Company’s money market funds approximate their fair values due to their nature, duration and short maturities. As of December 31, 2022, all marketable securities were due in two years or less. The amortized cost and fair value of marketable securities as of December 31, 2022 were as follows (in thousands):
|  | Amortized Cost |  | Gross Unrealized Losses |  | Fair Value
U.S. government securities |  | $ | 114,119 |  |  | $ | (1,379) |  |  | $ | 112,740 |
Commercial paper |  | 62,262 |  |  | (71) |  |  | 62,191 |
U.S. government agency securities |  | 23,876 |  |  | (244) |  |  | 23,632 |
Corporate debt securities |  | 3,312 |  |  | (4) |  |  | 3,308 |
Municipal securities |  | 101 |  |  | (1) |  |  | 100 |
Total marketable securities |  | $ | 203,670 |  |  | $ | (1,699) |  |  | $ | 201,971 |
Unrealized gains and losses were not significant as of December 31, 2021.

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI https://asc.fasb.org/topic&trid=2196928 + Details
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