Financial Statement Components (Tables)

6 Months Ended

Jun. 30, 2021

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Cash and Cash Equivalents

Cash and cash equivalents consisted of the following (in thousands):

	June 30, 2021		December 31, 2020
Cash	$	16,299	$	10,652
Money market funds	31,867		64,971
U.S. Treasury	—		24,999
Commercial paper	86,523		108,322
Total cash and cash equivalents	$	134,689	$	208,944

Schedule of Inventories, net

Inventories consisted of the following (in thousands):

	June 30, 2021		December 31, 2020
Raw materials	$	2,419	$	625
Work-in-process	1,618		52
Finished goods	281		2,936
Total inventories, net	$	4,318	$	3,613

Schedule of Prepaid Expenses and Other Current Assets

Prepaid expenses and other current assets consisted of the following (in thousands):

	June 30, 2021		December 31, 2020
Prepaid expenses	$	6,307	$	1,073
Contract assets	5,026		—
Advance payments to vendors	539		961
Prepaid rent and other	1		503
Other receivables	1,787		2,260
Total prepaid expenses and other current assets	$	13,660	$	4,797

Schedule of Property and Equipment and Property and Equipment Capitalized Under Finance Lease (Capital Lease Prior to Adoption of ASC 842)

Property and equipment consisted of the following (in thousands):

	June 30, 2021		December 31, 2020
Computer hardware and software	$	2,978	$	2,450
Demonstration fleet and demonstration units	1,973		1,821
Machinery and equipment	6,803		5,940
Furniture and fixtures	293		293
Vehicles	856		835
Leasehold improvements	960		791
Construction in progress	2,463		1,410
Total property and equipment	16,326		13,540
Accumulated depreciation and amortization	(7,068)		(5,851)
Total property and equipment, net	$	9,258	$	7,689

Property and equipment capitalized under finance lease (capital lease prior to adoption of ASC 842) consisted of the following (in thousands):

	June 30, 2021		December 31, 2020
Computer hardware and software	$	88	$	88
Machinery and equipment	838		838
Total property and equipment, gross	926		926
Less: accumulated depreciation	(285)		(219)
Total property and equipment, net	$	641	$	707

Schedule of Other Noncurrent Assets

Other non-current assets consisted of the following (in thousands):

	June 30, 2021		December 31, 2020
Security deposits	$	1,038	$	1,106
Other non-current assets	1,603		45
Total other non-current assets	$	2,641	$	1,151

Schedule of Accrued and Other Current Liabilities

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

	June 30, 2021		December 31, 2020
Accrued expenses	$	4,959	$	3,998
Warranty liabilities	331		259
Contract liabilities	586		2,284
Accrued compensation and benefits	3,788		3,071
Contract losses	220		558
Finance lease (capital lease prior to adoption of ASC 842) liabilities, current	273		282
Employee tax withholding	2,747		—
Total accrued and other current liabilities	$	12,904	$	10,452

Schedule of Other Non-Current Liabilities

Other non-current liabilities consisted of the following (in thousands): 

	June 30, 2021		December 31, 2020
Deferred rent	$	—	$	826
Finance lease (capital lease prior to adoption of ASC 842) liabilities, non-current	198		331
Other non-current liabilities	935		161
Total other non-current liabilities	$	1,133	$	1,318