Investment Securities (Tables)

9 Months Ended

Sep. 30, 2023

Investments, Debt and Equity Securities [Abstract]

Schedule of Available-for-sale Securities Reconciliation [Table Text Block]

Our short-term and long-term investments in available-for-sale securities consist of the following (in thousands):

	As of September 30, 2023
	Amortized Cost		Unrealized Holding Gains (Losses)		Fair Value
Short-term corporate bonds	1,306		$	—	$	1,306
Short-term government bonds	500		—		500
Total investment securities	$	1,806	$	—	$	1,806
	As of December 31, 2022
	Amortized Cost		Unrealized Holding Gains (Losses)		Fair Value
Short-term corporate bonds	$	2,314	$	—	$	2,314
Short-term U.S. treasury securities	1,412		—		1,412
Short-term government bonds	498		—		498
Long-term corporate bonds	516		—		516
Total investment securities	$	4,740	$	—	$	4,740

Equity Method Investments [Table Text Block]

Our non-marketable equity method investment consists of the following (in thousands):

	As of
	September 30, 2023		December 31, 2022
Equity method investment	$	3,145	$	3,178