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Revenue from Contracts with Customers (Tables) | 12 Months Ended
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Dec. 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 years ended December 31, 2023 and 2022:
|  | Year Ended December 31, |
|  | 2023 |  |  | 2022 |
United States |  | $ | 25,262 |  |  | $ | 18,776 |
South Korea |  |  | 257 |  |  |  | 2,180 |
Europe |  |  | 5,585 |  |  |  | 4,409 |
Asia (excluding South Korea) |  |  | 3,836 |  |  |  | 3,576 |
Other |  |  | 776 |  |  |  | 502 |
Total 1 |  | $ | 35,716 |  |  | $ | 29,443 |
1 The table above does not include lease revenue of $6,448 and $5,915 for the years ended December 31, 2023 and 2022, respectively. Refer to Note 6, 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:
|  |  |  | As of December 31, |
|  | Classification |  | 2023 |  |  | 2022 |
Accounts receivable, current |  | Accounts receivable, net |  | $ | 4,001 |  |  | $ | 6,040 |
Notes receivable, current |  | Notes receivable, net |  | $ | 323 |  |  | $ | 200 |
Notes receivable, long-term |  | Notes and other receivables, long-term, net |  | $ | 1,279 |  |  | $ | 442 |
Contract asset, current |  | Prepaid and other current assets |  | $ | 982 |  |  | $ | 332 |
Deferred revenue, current |  | Deferred revenue |  | $ | 1,349 |  |  | $ | 768 |
Deferred revenue, non-current |  | Other long-term liabilities |  | $ | 350 |  |  | $ | 17 |
Contract liability, long-term |  | Other long-term liabilities |  | $ | 220 |  |  | $ | 150 |
The following table provides information about contract liabilities from contracts with customers:
|  | Amount |
Contract liabilities as of December 31, 2021 |  | $ | 970 |
Billings not yet recognized as revenue |  |  | 822 |
Beginning contract liabilities recognized as revenue |  |  | (857 | )
Contract liabilities at December 31, 2022 |  |  | 935 |
Billings not yet recognized as revenue |  |  | 1,847 |
Beginning contract liabilities recognized as revenue |  |  | (863 | )
Contract liabilities at December 31, 2023 |  | $ | 1,919 |
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, 2021 |  | $ | 47 |
Change in provision for credit losses |  |  | 26 |
Write-offs |  |  | (17 | )
Accounts receivable, allowance for credit losses as of December 31, 2022 |  |  | 56 |
Change in provision for credit losses |  |  | 6 |
Write-offs |  |  | — |
Accounts receivable, allowance for credit losses as of December 31, 2023 |  | $ | 62 |
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, 2021 |  | $ | 63 |
Change in provision for credit losses |  |  | 10 |
Write-offs |  |  | (60 | )
Notes receivable, allowance for credit losses as of December 31, 2022 |  |  | 13 |
Change in provision for credit losses |  |  | 20 |
Write-offs |  |  | — |
Notes receivable, allowance for credit losses as of December 31, 2023 |  | $ | 33 |
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] | The following table provides information about receivables and contract liabilities from contracts with customers:
|  |  |  | As of December 31, |
|  | Classification |  | 2023 |  |  | 2022 |
Accounts receivable, current |  | Accounts receivable, net |  | $ | 4,001 |  |  | $ | 6,040 |
Notes receivable, current |  | Notes receivable, net |  | $ | 323 |  |  | $ | 200 |
Notes receivable, long-term |  | Notes and other receivables, long-term, net |  | $ | 1,279 |  |  | $ | 442 |
Contract asset, current |  | Prepaid and other current assets |  | $ | 982 |  |  | $ | 332 |
Deferred revenue, current |  | Deferred revenue |  | $ | 1,349 |  |  | $ | 768 |
Deferred revenue, non-current |  | Other long-term liabilities |  | $ | 350 |  |  | $ | 17 |
Contract liability, long-term |  | Other long-term liabilities |  | $ | 220 |  |  | $ | 150 |
The following table provides information about contract liabilities from contracts with customers:
|  | Amount |
Contract liabilities as of December 31, 2021 |  | $ | 970 |
Billings not yet recognized as revenue |  |  | 822 |
Beginning contract liabilities recognized as revenue |  |  | (857 | )
Contract liabilities at December 31, 2022 |  |  | 935 |
Billings not yet recognized as revenue |  |  | 1,847 |
Beginning contract liabilities recognized as revenue |  |  | (863 | )
Contract liabilities at December 31, 2023 |  | $ | 1,919 |
Summary of Maturities of Notes Receivables Net Under Extended Payment Terms | Maturities of notes receivables, net under extended payment terms with a significant financing component as of December 31, 2023 are as follows:
Fiscal Year |  | Amount |
2024 |  |  | 432 |
2025 |  |  | 432 |
2026 |  |  | 432 |
2027 |  |  | 386 |
2028 |  |  | 185 |
Thereafter |  |  | 14 |
Total undiscounted cash flows |  |  | 1,881 |
Present value of notes receivable |  |  | 1,635 |
Difference between undiscounted and discounted cash flows |  | $ | 246 |
Contract Assets – The Company's contract assets represent revenue recognized for performance obligations completed before an unconditional right to payment exists, and therefore invoicing has not yet occurred. The Company classifies contract assets in Prepaid and other current assets in the Company's balance sheets. The following table provides information about contract assets from contracts with customers:
|  | Amount |
Contract assets at December 31, 2021 |  | $ | — |
Contract assets recognized |  |  | 355 |
Payments received |  |  | (23 | )
Contract assets at December 31, 2022 |  |  | 332 |
Contract assets recognized |  |  | 1,630 |
Payments received |  |  | (806 | )
Write-offs due to contract modifications |  |  | (174 | )
Contract assets at December 31, 2023 |  | $ | 982 |
Summary of Costs to Obtain Customer Contracts | The following table provides information about the costs to obtain contracts associated with contracts with customers for the years ended December 31, 2023 and 2022:
|  | Year Ended December 31, |
|  | 2023 |  |  | 2022 |
Beginning balance |  | $ | 4 |  |  | $ | 43 |
Additions |  |  | 611 |  |  |  | 350 |
Amortization |  |  | (580 | ) |  |  | (389 | )
Ending balance |  | $ | 35 |  |  | $ | 4 |

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