Investments (Tables)

3 Months Ended

Mar. 31, 2023

Investments, Debt and Equity Securities [Abstract]

Schedule of Available-for-sale Securities

The following table summarizes our investments, available-for-sale:

	March 31, 2023						December 31, 2022
$ in thousands	Amortized Cost		Unrealized Losses		Fair Value		Amortized Cost		Unrealized Losses		Fair Value
Corporate bonds	$	—	$	—	$	—	$	3,997	$	(22)	$	3,975
Commercial paper	14,927		(4)		14,923		10,837		(3)		10,834
U.S. treasury bills	65,909		(132)		65,777		82,979		(284)		82,695
Total investments, available-for-sale	$	80,836	$	(136)	$	80,700	$	97,813	$	(309)	$	97,504