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FAIR VALUE MEASUREMENTS (Tables)
12 Months Ended
Dec. 31, 2024
FAIR VALUE MEASUREMENTS:  
Summary of Assets Measured at Fair Value on a Recurring Basis (In Thousands)

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Fair Value Measurements Using

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Balance Sheet

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December 31, 

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Assets

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Classification

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2024

    

(Level 1)

    

(Level 2)

    

Level 3)

Money market mutual funds

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Cash equivalents

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$

66,213

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$

66,213

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$

—

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$

—

Available-for-sale debt securities:

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U.S. Government securities (1)

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Short-term investments

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24,291

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24,291

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—

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—

Convertible note receivable (2)

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Non-current assets

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2,038

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—

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—

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2,038

Total

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$

92,542

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$

90,504

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$

—

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$

2,038

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Fair Value Measurements Using

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Balance Sheet

​

December 31, 

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Assets

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Classification

    

2023

    

(Level 1)

    

(Level 2)

    

(Level 3)

Money market mutual funds

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Cash equivalents

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$

83,810

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$

83,810

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$

—

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$

—

Available-for-sale debt securities:

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U.S. Government securities (1)

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Short-term investments

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36,544

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36,544

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—

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—

Total

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$

120,354

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$

120,354

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$

—

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$

—

(1)The carrying amount of the Company’s investments in U.S. Government securities approximate fair value due to their short-term maturities, and there have been no events or changes in circumstances that would have had a significant effect on the fair value of these securities as of December 31, 2024 and 2023.
(2)In August 2024, the Company purchased a $2.0 million non-marketable convertible promissory note from an unrelated third party (the “convertible note”). The convertible note bears a 5% interest rate annually and will mature in August 2026.