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Investments | 9 Months Ended
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Sep. 30, 2023
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:
| September 30, 2023
| Amortized Cost |  | Gross unrealized |  | Estimated Fair Value
(In thousands) |  | Gains |  | Losses |
Available-for-sale securities, current portion |  |  |  |  |  |  |
U.S. government securities | $ | 5,030 |  |  | $ | - |  |  | $ | 2 |  |  | $ | 5,028 |
Corporate debt securities | 15,901 |  |  | 1 |  |  | 4 |  |  | 15,898 |
Other debt securities | 868 |  |  | - |  |  | - |  |  | 868 |
Total short-term | 21,799 |  |  | 1 |  |  | 6 |  |  | 21,794 |
Available-for-sale securities, long-term |  |  |  |  |  |  |
Other debt securities | 1,158 |  |  | 2 |  |  | 4 |  |  | 1,156 |
Total marketable securities | $ | 22,957 |  |  | $ | 3 |  |  | $ | 10 |  |  | $ | 22,950 |
| December 31, 2022
| Amortized Cost |  | Gross unrealized |  | Estimated Fair Value
(In thousands) |  | Gains |  | Losses |
Available-for-sale securities, current portion |  |  |  |  |  |  |
U.S. government securities | $ | 15,087 |  |  | $ | 1 |  |  | $ | 37 |  |  | $ | 15,051 |
Corporate debt securities | 26,057 |  |  | 6 |  |  | 16 |  |  | 26,047 |
Other debt securities | 2,169 |  |  | - |  |  | 7 |  |  | 2,162 |
Total short-term | 43,313 |  |  | 7 |  |  | 60 |  |  | 43,260 |
Available-for-sale securities, long-term |  |  |  |  |  |  |
Other debt securities | 1,329 |  |  | 3 |  |  | - |  |  | 1,332 |
Total marketable securities | $ | 44,642 |  |  | $ | 10 |  |  | $ | 60 |  |  | $ | 44,592 |
| September 30, 2023
(In thousands) | Amortized Cost |  | Estimated Fair Value
Due in one year or less | $ | 21,799 |  |  | $ | 21,794 |
Due after one year through five years | 1,158 |  |  | 1,156 |
Total | $ | 22,957 |  |  | $ | 22,950 |
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 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 A-1 and A-2 Preferred Stock in iVexSol, Inc. carried at $4.1 million for the periods ending September 30, 2023 and December 31, 2022, and Series E Preferred Stock in PanTHERA CryoSolutions, Inc. carried at $995,000 as of September 30, 2023 and December 31, 2022.

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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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