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Investment Securities (Tables)
3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2024
Investments, Debt and Equity Securities [Abstract]    
Schedule of Available-for-sale Securities Reconciliation [Table Text Block]
As of June 30, 2024, we did not have any investment securities. As of December 31, 2023, the amortized cost, unrealized holding gains (losses) and fair value of our available-for-sale investment securities were as follows (in thousands):
As of December 31, 2023
Amortized CostUnrealized Holding
Gains (Losses)
Fair Value
Short-term corporate bonds$501 $— $501 
 
Equity Method Investments [Table Text Block]  
Our non-marketable equity method investment consists of the following (in thousands):

As of
June 30, 2024December 31, 2023
Equity method investment$3,091 $3,120