Schedule of marketable securities |
Debt securities consisted of the following (in thousands): | | | | | | | | | | | | | September 30, 2020 | | December 31, 2019 | Commercial paper | $ | 63,163 | | | $ | 17,152 | | Corporate debt securities | 139,548 | | | 306,436 | | Securities of government sponsored entities | 53,075 | | | 12,500 | | Total debt securities | $ | 255,786 | | | $ | 336,088 | |
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Debt securities available for sale |
The following is a summary of short-term debt securities classified as available-for-sale as of September 30, 2020 (in thousands): | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Remaining Contractual Maturity (in years) | | Amortized Cost | | Unrealized Gains | | Unrealized Losses | | Aggregate Estimated Fair Value | Commercial paper | Less than 1 | | $ | 63,167 | | | $ | 2 | | | $ | (6) | | | $ | 63,163 | | Corporate debt securities | Less than 1 | | 91,922 | | | 619 | | | — | | | 92,541 | | Securities of government-sponsored entities | Less than 1 | | 43,081 | | | — | | | — | | | 43,081 | | Total maturity less than 1 year | | | 198,170 | | | 621 | | | (6) | | | 198,785 | | Corporate debt securities | 1 to 2 | | 46,485 | | | 522 | | | — | | | 47,007 | | Securities of government-sponsored entities | 1 to 2 | | 10,000 | | | 1 | | | (7) | | | 9,994 | | Total maturity 1 to 2 years | | | 56,485 | | | 523 | | | (7) | | | 57,001 | | Total available-for-sale securities | | | $ | 254,655 | | | $ | 1,144 | | | $ | (13) | | | $ | 255,786 | |
The following is a summary of short-term debt securities classified as available-for-sale as of December 31, 2019 (in thousands): | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Remaining Contractual Maturity (in years) | | Amortized Cost | | Unrealized Gains | | Unrealized Losses | | Aggregate Estimated Fair Value | Commercial paper | Less than 1 | | $ | 17,136 | | | $ | 16 | | | $ | — | | | $ | 17,152 | | Corporate debt securities | Less than 1 | | 191,770 | | | 582 | | | (10) | | | 192,342 | | | | | | | | | | | | Total maturity less than 1 year | | | 208,906 | | | 598 | | | (10) | | | 209,494 | | Corporate debt securities | 1 to 2 | | 113,799 | | | 351 | | | (56) | | | 114,094 | | Securities of government-sponsored entities | 1 to 2 | | 12,501 | | | — | | | (1) | | | 12,500 | | Total maturity 1 to 2 years | | | 126,300 | | | 351 | | | (57) | | | 126,594 | | Total available-for-sale securities | | | $ | 335,206 | | | $ | 949 | | | $ | (67) | | | $ | 336,088 | |
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Schedule of securities in an unrealized loss position |
The following is a summary of available-for-sale debt securities in an unrealized loss position with no credit losses reported as of September 30, 2020 (in thousands): | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Less Than 12 Months | | 12 Months or Greater | | Total | Description of Securities | | Fair Value | | Unrealized Losses | | Fair Value | | Unrealized Losses | | Fair Value | | Unrealized Losses | Commercial paper | | $ | 58,166 | | | $ | 6 | | | $ | — | | | $ | — | | | $ | 58,166 | | | $ | 6 | | Corporate debt securities | | — | | | — | | | — | | | — | | | — | | | — | | Securities of government-sponsored entities | | 43,074 | | | 7 | | | — | | | — | | | 43,074 | | | 7 | | Total | | $ | 101,240 | | | $ | 13 | | | $ | — | | | $ | — | | | $ | 101,240 | | | $ | 13 | |
The following is a summary of available-for-sale debt securities in an unrealized loss position with no credit losses reported as of December 31, 2019 (in thousands): | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Less Than 12 Months | | 12 Months or Greater | | Total | Description of Securities | | Fair Value | | Unrealized Losses | | Fair Value | | Unrealized Losses | | Fair Value | | Unrealized Losses | Commercial paper | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | Corporate debt securities | | 74,151 | | | 64 | | | 7,509 | | | 2 | | | 81,660 | | | 66 | | Securities of government-sponsored entities | | 5,000 | | | 1 | | | — | | | — | | | 5,000 | | | 1 | | Total | | $ | 79,151 | | | $ | 65 | | | $ | 7,509 | | | $ | 2 | | | $ | 86,660 | | | $ | 67 | |
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