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Revenue from Contracts with Customers (Tables) | 6 Months Ended
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Jun. 30, 2022
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 and six months ended June 30, 2022 and 2021:
|  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
|  | 2022 |  |  | 2021 |  |  | 2022 |  |  | 2021 |
United States |  | $ | 4,097 |  |  | $ | 3,942 |  |  | $ | 8,067 |  |  | $ | 7,380 |
South Korea |  |  | 662 |  |  |  | 1,190 |  |  |  | 2,096 |  |  |  | 2,188 |
Europe |  |  | 956 |  |  |  | 921 |  |  |  | 2,575 |  |  |  | 1,810 |
Asia (excluding South Korea) |  |  | 771 |  |  |  | 633 |  |  |  | 1,551 |  |  |  | 1,175 |
Other |  |  | 137 |  |  |  | 96 |  |  |  | 275 |  |  |  | 161 |
Total1 |  | $ | 6,623 |  |  | $ | 6,782 |  |  | $ | 14,564 |  |  | $ | 12,714 |
1 The table above does not include lease revenue of $1,415 and $1,140 for three months ended June 30, 2022 and 2021, respectively, and $2,814 and $2,251 for the six months ended June 30, 2022 and 2021, 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 June 30, 2022 |  |  | As of December 31, 2021 |
Accounts receivable, current |  | Accounts receivable, net |  | $ | 2,760 |  |  | $ | 4,638 |
Notes receivable, current |  | Notes receivable, net |  | $ | 164 |  |  | $ | 350 |
Notes receivable, long-term |  | Notes and other receivables, long-term, net |  | $ | 29 |  |  | $ | 121 |
Contract liability, current |  | Deferred revenue |  | $ | 937 |  |  | $ | 904 |
Contract liability, non-current |  | Other long-term liabilities |  | $ | 37 |  |  | $ | 66 |
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 |  |  | 637 |
Beginning contract liabilities recognized as revenue |  |  | (633 | )
Contract liabilities as of June 30, 2022 |  | $ | 974 |
Contract liabilities as of December 31, 2020 |  | $ | 1,051 |
Billings not yet recognized as revenue |  |  | 713 |
Beginning contract liabilities recognized as revenue |  |  | (622 | )
Contract liabilities as of June 30, 2021 |  | $ | 1,142 |
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 |
Provision for credit losses |  |  | (6 | )
Write-offs |  |  | (16 | )
Accounts receivable, allowance for credit losses as of June 30, 2022 |  | $ | 25 |
Accounts receivable, allowance for credit losses as of December 31, 2020 |  | $ | 19 |
Provision for credit losses |  |  | 8 |
Write-offs |  |  | — |
Accounts receivable, allowance for credit losses as of June 30, 2021 |  | $ | 27 |
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 |
Provision for credit losses |  |  | 130 |
Write-offs |  |  | (11 | )
Notes receivable, allowance for credit losses as of June 30, 2022 |  | $ | 182 |
Notes receivable, allowance for credit losses as of December 31, 2020 |  | $ | 18 |
Provision for credit losses |  |  | (3 | )
Write-offs |  |  | — |
Notes receivable, allowance for credit losses as of June 30, 2021 |  | $ | 15 |

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- Definition Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130551-203045 + Details
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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130545-203045 + Details
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