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Financial Statement Components | 9 Months Ended
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Sep. 30, 2021
Financial Statement Components [Abstract] |
Financial Statement Components | 5. Financial Statement Components Accounts receivable, net of allowances consist of the following:
| As of December 31, |  | As of September 30,
| 2020 |  | 2021
Trade accounts receivable | $ | 26,504 |  |  | $ | 42,987 |
Unbilled accounts receivable | 27,692 |  |  | 32,665 |
Allowance for doubtful accounts and reserve for expected credit losses | (1,203) |  |  | (1,467) |
Other accounts receivable | 2,250 |  |  | 976 |
Total accounts receivable, net | $ | 55,243 |  |  | $ | 75,161 |
Components of allowance for doubtful accounts and reserve for expected credit losses are as follows:
| Three months ended September 30, |  |  |  | Nine months ended September 30,
| 2020 |  | 2021 |  |  |  | 2020 |  | 2021
Allowance for doubtful accounts: |  |  |  |  |  |  |  |  |
Balance, beginning of period | $ | (597) |  |  | $ | (1,364) |  |  |  |  | $ | (769) |  |  | $ | (1,203) |
Charged to bad debt expense | (312) |  |  | (169) |  |  |  |  | (492) |  |  | (475) |
Deductions (1) | 20 |  |  | 54 |  |  |  |  | 372 |  |  | 182 |
Impact of foreign currency translation | — |  |  | 12 |  |  |  |  | — |  |  | 29 |
Balance, end of period | $ | (889) |  |  | $ | (1,467) |  |  |  |  | $ | (889) |  |  | $ | (1,467) |
________________________ (1) Write off of uncollectible accounts after all collection efforts have been exhausted. Accrued expenses and other current liabilities consisted of the following:
| As of December 31, |  | As of September 30,
| 2020 |  | 2021
Accrued expense | $ | 31,549 |  |  | $ | 39,444 |
Accrued compensation and benefits | 19,534 |  |  | 17,341 |
Accrued sales, use, VAT and telecommunications related taxes | 9,142 |  |  | 10,322 |
Current portion of finance lease | 183 |  |  | 190 |
Obligation included in basis of acquired land | — |  |  | 7,752 |
Other accrued expenses | 2,657 |  |  | 1,210 |
Total accrued expenses and other current liabilities | $ | 63,065 |  |  | $ | 76,259 |

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- Definition The entire disclosures of supplemental information, including descriptions and amounts, related to the balance sheet, income statement, and/or cash flow statement. + References No definition available. + Details
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