Investments (Tables)

6 Months Ended

Jun. 30, 2023

Equity Method Investments and Joint Ventures [Abstract]

Investments

The Company’s equity investments consisted of the following (in thousands):

	As of
	June 30, 2023		December 31, 2022
Equity Method Investment in LanzaJet	$	10,164	$	10,561
Equity Security Investment in SGLT	14,990		14,990
Total Investment	$	25,154	$	25,551

Debt Securities, Held-to-Maturity

The Company has held-to-maturity securities consisting of U.S. Treasury securities. All held-to-maturity securities have contractual maturities due in one year or less.

	As of
	June 30, 2023		March 31, 2023
Amortized cost, net of accrued interest	$	49,611	$	49,103
Accrued interest	93		30
Total	$	49,704	$	49,133
Aggregate Fair Value	49,593		49,098
Gross unrealized gains	5		1
Gross unrealized losses	(23)		(6)