Revenue from Contracts with Customers (Tables)

3 Months Ended

Mar. 31, 2023

Revenue From Contract With Customer [Abstract]

Summary of Product and Service Revenue Disaggregated by Geographic Region

The following table summarizes the Company’s product and service revenue disaggregated by geographic region, which is determined based on customer location, for the three months ended March 31, 2023 and 2022:

	Three Months Ended March 31,
	2023		2022
United States	$	4,264	$	3,970
South Korea		9		1,434
Europe		1,538		1,619
Asia (excluding South Korea)		708		780
Other		104		138
Total1	$	6,623	$	7,941

1.The table above does not include lease revenue of $1,629 and $1,399 for three months ended March 31, 2023 and 2022, respectively. Substantially all lease revenue originates from the United States. Refer to Note 5, Leases.

Summary of Information about Receivables and Contract Liabilities from Contracts with Customers

The following table provides information about receivables and contract liabilities from contracts with customers:

	Classification	As of March 31, 2023		As of December 31, 2022
Accounts receivable, current	Accounts receivable, net	$	4,660	$	6,040
Notes receivable, current	Notes receivable, net	$	203	$	200
Notes receivable, long-term	Notes and other receivables, long-term, net	$	768	$	442
Contract asset, current	Prepaid and other current assets	$	404	$	332
Deferred revenue, current	Deferred revenue	$	1,032	$	768
Deferred revenue, non-current	Other long-term liabilities	$	198	$	17
Contract liability, long-term	Other long-term liabilities	$	161	$	150

The following table provides information about contract assets from contracts with customers:

	Amount
Contract assets as of December 31, 2022	$	332
Contract assets recognized		117
Payments received		(45	)
Contract assets as of March 31, 2023	$	404

The following table provides information about contract liabilities from contracts with customers:

	Amount
Contract liabilities as of December 31, 2022	$	935
Billings not yet recognized as revenue		823
Beginning contract liabilities recognized as revenue		(367	)
Contract liabilities as of March 31, 2023	$	1,391
Contract liabilities as of December 31, 2021	$	970
Billings not yet recognized as revenue		432
Beginning contract liabilities recognized as revenue		(361	)
Contract liabilities as of March 31, 2022	$	1,041

Summary of Allowance for Accounts Receivable

The following table summarizes the activity in the allowance for accounts receivable:

	Amount
Accounts receivable, allowance for credit losses as of    December 31, 2022	$	56
Provision for credit losses		(13	)
Write-offs		—
Accounts receivable, allowance for credit losses as of    March 31, 2023	$	43
Accounts receivable, allowance for credit losses as of    December 31, 2021	$	47
Provision for credit losses		3
Write-offs		(16	)
Accounts receivable, allowance for credit losses as of    March 31, 2022	$	34

Summary of Allowance for Notes Receivable

The following table summarizes the activity in the allowance for notes receivable:

	Amount
Notes receivable, allowance for credit losses as of    December 31, 2022	$	13
Provision for credit losses		7
Write-offs		—
Notes receivable, allowance for credit losses as of    March 31, 2023	$	20
Notes receivable, allowance for credit losses as of    December 31, 2021	$	63
Provision for credit losses		129
Write-offs		(11	)
Notes receivable, allowance for credit losses as of    March 31, 2022	$	181