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Note 6 - Marketable Equity Securities | 3 Months Ended
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Mar. 31, 2024
Notes to Financial Statements |
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] |
6. | Marketable Equity Securities
In April 2023, the Company obtained shares of common stock of Harvard Apparatus Regenerative Technologies, Inc. (“HRGN” formerly known as Biostage, Inc.) in connection with settlement of indemnification obligations related to litigation which occurred during the year ended December 31, 2022. These shares had an estimated fair value of $1.7 million and $3.5 million, as of March 31, 2024, and December 31, 2023, respectively, and are included in the consolidated balance sheets as a component of other long-term assets. The Company received cash proceeds of $0.5 million from the sale of HRGN shares sold during the three months ended March 31, 2024, which resulted in a realized loss on sale of $0.3 million. The Company incurred an unrealized loss of $1.0 million on HRGN shares held during the three months ended March 31, 2024. The Company determines the fair value of its HRGN common stock based on the closing price as quoted on the OTCQB Marketplace at the reporting date. Due to HRGN’s limited operating history, its overall financial condition and the limited trading volumes and liquidity of its common stock, the value of the Company’s investment in this common stock could fluctuate considerably or become worthless.

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