Balance Sheet Components

3 Months Ended

Mar. 31, 2022

Balance Sheet Related Disclosures [Abstract]

3. Balance Sheet Components

Inventory

Inventory consisted of the following:


	March 31,		December 31,
	2022		2021
	(in thousands)
Raw materials	$	6,141	$	4,911
Work in process		310		270
Finished goods		3,683		2,969
Total inventory	$	10,134	$	8,150

The Company recorded a reserve for excess and obsolete inventory of $0.6 million and $0.7 million at March 31, 2022 and December 31, 2021, respectively.

Intangible assets, net

Intangible assets as of March 31, 2022 and December 31, 2021 consisted of the following:


	March 31, 2022
	Weighted Average Amortization Period	Gross		Accumulated Amortization		Net
	(in years)	(in thousands)
Developed Technology (5 - 10 years)	4.0	$	2,445	$	857	$	1,588
Customer relationships (7 years)	2.8		1,910		944		966
Tradenames (10 years)	0.8		360		124		236
Total intangible assets	7.6	$	4,715	$	1,925	$	2,790


	December 31, 2021
	Weighted Average Amortization Period	Gross		Accumulated Amortization		Net
	(in years)	(in thousands)
Developed Technology (5 - 10 years)	4.0	$	2,445	$	768	$	1,677
Customer relationships (7 years)	2.8		1,910		875		1,035
Tradenames (10 years)	0.8		360		116		244
Total intangible assets	7.6	$	4,715	$	1,759	$	2,956

Amortization expense was $0.2 million for the three months ended March 31, 2022, with approximately $0.1 million amortization expense recorded in cost of sales and $0.1 million recorded in selling, general and administrative expenses in the accompanying unaudited condensed consolidated statements of operations and comprehensive loss. Amortization expense was $0.1 million for the three months ended March 31, 2021, which was mostly recorded in selling, general and administrative expenses in the accompanying unaudited condensed consolidated statements of operations and comprehensive loss.

The following table presents estimated future annual amortization expense related to intangible assets, net as of March 31, 2022:


	Future Intangible Asset Amortization Expenses
	(in thousands)
2022 (remaining nine months)	$	498
2023		618
2024		442
2025		386
2026 and thereafter		846
Total future amortization expense	$	2,790