Investment Securities (Tables)

3 Months Ended

Mar. 31, 2022

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 March 31, 2022
	Amortized Cost		Unrealized Holding Gains (Losses)		Fair Value
Short-term corporate bonds	$	14,864	$	—	$	14,864
Long-term corporate bonds	2,539		—		2,539
Total investment securities	$	17,403	$	—	$	17,403
	As of December 31, 2021
	Amortized Cost		Unrealized Holding Gains (Losses)		Fair Value
Short-term corporate bonds	$	14,420	$	—	$	14,420
Long-term corporate bonds	4,620		—		4,620
Total investment securities	$	19,040	$	—	$	19,040

Equity Method Investments [Table Text Block]

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

	As of
	March 31, 2022		December 31, 2021
Equity method investment	$	3,209	$	3,238