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Marketable Securities | 3 Months Ended
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Mar. 31, 2020
Investments Debt And Equity Securities [Abstract] |
Marketable Securities | 7. MARKETABLE SECURITIES At March 31, 2020 and December 31, 2019, the fair value of marketable securities, which were all classified as available for sale, included the following (in thousands):
|  | March 31, 2020 |
|  | Adjusted Cost |  |  | Unrealized Gains |  |  | Unrealized Losses |  |  | Fair Value |
Level 2: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate debt securities |  | $ | 34,686 |  |  | $ | — |  |  | $ | (101 | ) |  | $ | 34,585 |
Total |  | $ | 34,686 |  |  | $ | — |  |  | $ | (101 | ) |  | $ | 34,585 |
|  | December 31, 2019 |
|  | Adjusted Cost |  |  | Unrealized Gains |  |  | Unrealized Losses |  |  | Fair Value |
Level 2: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate debt securities |  | $ | 37,325 |  |  | $ | 7 |  |  | $ | (5 | ) |  | $ | 37,327 |
Government-sponsored enterprise debt securities |  |  | 4,001 |  |  |  | — |  |  |  | — |  |  |  | 4,001 |
Total |  | $ | 41,326 |  |  | $ | 7 |  |  | $ | (5 | ) |  | $ | 41,328 |
The carrying amounts reported in the Condensed Consolidated Balance Sheet approximate the fair value based on quoted market prices or alternative pricing sources and models utilizing market observable inputs. As of March 31, 2020, the Company did not recognize any allowance for credit impairments on its available for sale debt securities. All investments in marketable securities are classified as current assets on the balance sheet because the underlying securities mature within one year from the balance sheet date.

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- Definition The entire disclosure for investments in certain debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2209399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2324412 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2176304 + Details
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