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Investments | 6 Months Ended
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Jun. 30, 2024
Investments, Debt and Equity Securities [Abstract] |
Investments | Investments Available-for-sale securities The Company’s portfolio of available-for-sale marketable securities consists of the following:
| June 30, 2024
| Amortized Cost |  | Gross unrealized |  | Estimated Fair Value
(In thousands) |  | Gains |  | Losses |
Available-for-sale securities, current portion |  |  |  |  |  |  |
U.S. government securities | $ | 4,158 |  |  | $ | - |  |  | $ | (5) |  |  | $ | 4,153 |
Corporate debt securities | 6,120 |  |  | - |  |  | (6) |  |  | 6,114 |
Other debt securities | 1,853 |  |  | 1 |  |  | (1) |  |  | 1,853 |
Total short-term | 12,131 |  |  | 1 |  |  | (12) |  |  | 12,120 |
Available-for-sale securities, long-term |  |  |  |  |  |  |
Corporate debt securities | 1,392 |  |  | - |  |  | (1) |  |  | 1,391 |
Other debt securities | 1,298 |  |  | - |  |  | (1) |  |  | 1,297 |
Total marketable securities | $ | 14,821 |  |  | $ | 1 |  |  | $ | (14) |  |  | $ | 14,808 |
| December 31, 2023
| Amortized Cost |  | Gross unrealized |  | Estimated Fair Value
(In thousands) |  | Gains |  | Losses |
Available-for-sale securities, current portion |  |  |  |  |  |  |
U.S. government securities | $ | 5,169 |  |  | $ | 1 |  |  | $ | - |  |  | $ | 5,170 |
Corporate debt securities | 9,673 |  |  | 5 |  |  | (4) |  |  | 9,674 |
Other debt securities | 1,443 |  |  | 1 |  |  | - |  |  | 1,444 |
Total short-term | 16,285 |  |  | 7 |  |  | (4) |  |  | 16,288 |
Available-for-sale securities, long-term |  |  |  |  |  |  |
Other debt securities | 545 |  |  | 3 |  |  | - |  |  | 548 |
Total marketable securities | $ | 16,830 |  |  | $ | 10 |  |  | $ | (4) |  |  | $ | 16,836 |
| June 30, 2024
(In thousands) | Amortized Cost |  | Estimated Fair Value
Due in one year or less | $ | 12,131 |  |  | $ | 12,120 |
Due after one year through five years | 2,690 |  |  | 2,688 |
Total | $ | 14,821 |  |  | $ | 14,808 |
Equity investments The Company periodically invests in non-marketable equity securities of private companies without a readily determinable fair value to promote business and strategic objectives. The Company has adopted the measurement alternative whereby equity securities are carried at cost minus impairment, if any, plus or minus changes resulting from observable process changes in orderly transactions for identical or similar transactions of the same issuer. These securities included Series E Preferred Stock in PanTHERA CryoSolutions, Inc. carried at $1.0 million as of June 30, 2024 and December 31, 2023. The Company also owns securities of Series A-1 and A-2 Preferred Stock in iVexSol, Inc. carried at $4.1 million for the period ending December 31, 2023. During the three months ended June 30, 2024, the Company received communications that triggered a going concern for the investment. Though iVexSol, Inc. is actively seeking additional investment, the Company determined that the fair value of its equity interest was less than its carrying amount, and no longer recoverable under the additional investments of iVexSol. The Company recorded an impairment charge of $4.1 million, bringing the carrying value to zero as of June 30, 2024.

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- Definition The entire disclosure for investment. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/320/tableOfContent Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name Accounting Standards Codification -Topic 321 -Publisher FASB -URI https://asc.fasb.org/321/tableOfContent Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Name Accounting Standards Codification -Topic 325 -Publisher FASB -URI https://asc.fasb.org/325/tableOfContent + Details
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- References No definition available. + Details
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