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Balance Sheet Components

12 Months Ended

Dec. 31, 2021

Note 4. Balance Sheet Components

Property and Equipment, Net

Property and equipment, net consist of the following (in thousands):


	As of December 31,
	2021			2020
Tools and equipment	$	1,685		$	1,523
Computer equipment and software		100			118
Furniture and fixtures		254			43
Leasehold improvements		29			30
Construction in process		590			298
		2,658			2,012
Less: Accumulated depreciation		(1,204	)		(743	)
Property and equipment, net	$	1,454		$	1,269

Depreciation expense was $0.6 million and $0.6 million for the years ended December 31, 2021 and 2020 respectively.

Accrued and Other Current Liabilities

Accrued and other current liabilities consist of the following (in thousands):


	As of December 31,
	2021		2020
Accrued expenses	$	2,726	$	1,971
Current portion of lease liabilities		510		395
Short term interest payable		275		274
Other accrued liabilities		655		446
Total accrued and other current liabilities	$	4,166	$	3,086

Other Noncurrent Liabilities

Other noncurrent liabilities consist of the following (in thousands):


	As of December 31,
	2021		2020
Redeemable preferred stock warrants liabilities	$	—	$	2,112
Long term interest payable		841		465
Noncurrent portion of lease liabilities		1,040		134
Other noncurrent liabilities		38		344
Total other noncurrent liabilities	$	1,919	$	3,055