Investment Securities Table (Details) - USD ($) $ in Thousands	6 Months Ended	9 Months Ended
	Jun. 30, 2023	Sep. 30, 2023	Dec. 31, 2022		Sep. 30, 2022
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Amortized Cost		$ 1,806	$ 4,740
Debt Securities, Available-for-sale, Unrealized Loss	$ 0	0
Short-term investment securities		1,806	4,224	[1]
Long-term investment securities		0	516
Debt Securities, Available-for-sale		1,806	4,740
Corporate Debt Securities
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Amortized Cost, Current		1,306	2,314
Debt Securities, Available-for-sale, Noncurrent			516
Debt Securities, Available-for-sale, Unrealized Loss	0	0
Short-term investment securities		1,306	2,314
Long-term investment securities			516
US Treasury Securities
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Amortized Cost, Current			1,412
Debt Securities, Available-for-sale, Unrealized Loss	0
Short-term investment securities			1,412
US Government Debt Securities
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Amortized Cost, Current		500	498
Debt Securities, Available-for-sale, Unrealized Loss	$ 0	0
Short-term investment securities		$ 500	$ 498		$ 498

[1] December 31, 2022 balances were derived from audited consolidated financial statements.