Intangible Assets, Net (Tables)

9 Months Ended

Sep. 30, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Intangible Assets

Intangible assets consist of the following:

	September 30, 2023						December 31, 2022
(in thousands)	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Amortizable intangible assets:
Patents	$	4,629	$	(763)	$	3,866	$	3,792	$	(621)	$	3,170
License agreements	1,101		(1,086)		15		1,101		(1,014)		87
Total amortizable intangible assets	5,730		(1,849)		3,881		4,893		(1,635)		3,258
Unamortized intangible assets:
Trademarks	407		—		407		391		—		391
Total intangible assets	$	6,138	$	(1,849)	$	4,288	$	5,284	$	(1,635)	$	3,649

Schedule of Indefinite-Lived Intangible Assets

Intangible assets consist of the following:

	September 30, 2023						December 31, 2022
(in thousands)	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Amortizable intangible assets:
Patents	$	4,629	$	(763)	$	3,866	$	3,792	$	(621)	$	3,170
License agreements	1,101		(1,086)		15		1,101		(1,014)		87
Total amortizable intangible assets	5,730		(1,849)		3,881		4,893		(1,635)		3,258
Unamortized intangible assets:
Trademarks	407		—		407		391		—		391
Total intangible assets	$	6,138	$	(1,849)	$	4,288	$	5,284	$	(1,635)	$	3,649

Schedule of Amortization Expense

Amortization expense is as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
(in thousands)	2023		2022		2023		2022
Amortization expense	$	70	$	66	$	214	$	198

Schedule of Future Amortization

As of September 30, 2023, future amortization of patents and license agreements is as follows:

Year Ending December 31,	(in thousands)
2023 (excluding the nine months ended September 30, 2023)	$	56
2024	223
2025	223
2026	221
2027	218
Thereafter	2,940
Total	$	3,881

Schedule of Royalty Expenses

Royalty fee expense included in sales and marketing expense is as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
(in thousands)	2023		2022		2023		2022
Royalty fee expense	$	930	$	848	$	2,628	$	2,287