Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2023

Intangible Assets

Schedule of intangible assets

	June 30, 2023				December 31, 2022
	Gross Carrying		Accumulated		Gross Carrying		Accumulated
	Amount		Amortization		Amount		Amortization
Intangible assets:
Licenses	$	149	$	(56)	$	149	$	(51)
Patents		72		(3)		—		—
Patents pending		1,168		—		984		—
Trademarks		13		—		9		—
Trademarks pending		17		—		17		—
Total amortized intangible assets	$	1,419	$	(59)	$	1,159	$	(51)

Schedule of amortization expense for intangible assets

	Three Months Ended June 30,				Six Months Ended June 30,
	2023		2022		2023		2022
Amortization expense	$	3	$	2	$	8	$	5