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Investments
 6 Months Ended
Jun. 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:
June 30, 2023
Amortized
Cost		Gross unrealizedEstimated
Fair Value
(In thousands)GainsLosses
Available-for-sale securities, current portion    
U.S. government securities$5,911 $1 $3 $5,909 
Corporate debt securities18,346 1 9 18,338 
Other debt securities611 - - 611 
Total short-term24,868 2 12 24,858 
     
Available-for-sale securities, long-term    
Other debt securities1,839 5 5 1,839 
Total marketable securities$26,707 $7 $17 $26,697 
December 31, 2022
Amortized
Cost		Gross unrealizedEstimated
Fair Value
(In thousands)GainsLosses
Available-for-sale securities, current portion
U.S. government securities$15,087 $1 $37 $15,051 
Corporate debt securities26,057 6 16 26,047 
Other debt securities2,169 - 7 2,162 
Total short-term43,313 7 60 43,260 
Available-for-sale securities, long-term
Other debt securities1,329 3 - 1,332 
Total marketable securities$44,642 $10 $60 $44,592 
June 30, 2023
(In thousands)Amortized
Cost		Estimated
Fair Value
Due in one year or less$24,868 $24,858 
Due after one year through five years1,839 1,839 
Total$26,707 $26,697 
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 both the periods ending June 30, 2023 and December 31, 2022, respectively, and Series E Preferred Stock in PanTHERA CryoSolutions, Inc. carried at $995,000 as of June 30, 2023 and December 31, 2022.