Balance Sheet Components

12 Months Ended

Dec. 31, 2020

Balance Sheet Related Disclosures [Abstract]

Balance Sheet Components

2. Balance Sheet Components

Inventory

Inventory consists of the following (in thousands):

	December 31,		December 31,
	2020		2019
Work in process	$	4,925	$	2,529
Finished goods		3,976		3,519
Total inventory	$	8,901	$	6,048

Property and Equipment - Net

Property and equipment - net consists of the following (in thousands):

	December 31,			December 31,
	2020			2019
Computer equipment and software	$	1,851		$	1,405
Leasehold improvements		84			89
Furniture		36			30
Total property and equipment		1,971			1,524
Less: accumulated depreciation		(1,324	)		(989	)
Total property and equipment - net	$	647		$	535

The Company recorded $0.4 million, $0.3 million and $0.2 million of depreciation expense for each of the years ended December 31, 2020, 2019, and 2018, respectively.

Accrued Liabilities

Accrued liabilities consist of the following (in thousands):

	December 31,		December 31,
	2020		2019
Accrued inventory	$	931	$	283
Payroll-related expenses		889		780
Taxes payable		346		72
Engineering services		258		637
Accrued warranty		60		194
Professional fees		25		31
Other		14		15
Total accrued liabilities	$	2,523	$	2,012

Customer Deposits

Customer deposits represent payments received in advance of shipments and fluctuate depending on timing of customer pre-payments and product shipment. Customer deposits were $0.7 million and $1.4 million as of December 31, 2020 and December 31, 2019, respectively. The Company generally expects to recognize revenue from customer deposits during the three month interim period immediately following the balance sheet date. During the year ended December 31, 2020, the Company recognized $1.4 million of revenue from the December 31, 2019 customer deposits balance.