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STATEMENTS OF CASH FLOWS DATA | 12 Months Ended
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Dec. 31, 2020
Supplemental Cash Flow Elements [Abstract] |
STATEMENTS OF CASH FLOWS DATA | 11. STATEMENTS OF CASH FLOWS DATA
|  | Year Ended December 31, |
|  | 2020 |  |  | 2019 |  |  | 2018 |
|  | (In thousands) |
Supplemental operating and investing activities: |  |  |  |  |  |  |  |  |  |  |  |
Net unrealized (loss) gain on marketable securities |  | $ | (54 | ) |  | $ | 315 |  |  | $ | 24 |
Operating lease assets obtained in exchange for operating lease liabilities |  |  | 3,575 |  |  |  | 2,473 |  |  |  | — |
Interest paid |  | $ | 388 |  |  | $ | — |  |  | $ | — |

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- Definition The entire disclosure for supplemental cash flow activities, including cash, noncash, and part noncash transactions, for the period. Noncash is defined as information about all investing and financing activities of an enterprise during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -URI http://asc.fasb.org/topic&trid=2134446 + Details
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- References No definition available. + Details
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