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SIGNIFICANT ACCOUNTING POLICIES (Tables) | 12 Months Ended
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Dec. 31, 2021
Accounting Policies [Abstract] |
Schedule of reconciliation of the allowance for doubtful accounts | A reconciliation of the beginning and ending balances of the allowance for doubtful accounts is as follows (in thousands):
| Year Ended December 31,
| 2021 |  | 2020 |  | 2019
Balance, beginning of the period | $ | 1,402 |  |  | $ | 1,466 |  |  | $ | 1,143 |
Charges to earnings | 2,472 |  |  | 1,785 |  |  | 1,697 |
Write-off of uncollectible accounts receivable | (2,424) |  |  | (1,859) |  |  | (1,400) |
Recoveries collected | 6 |  |  | 10 |  |  | 26 |
Balance, end of the period | $ | 1,456 |  |  | $ | 1,402 |  |  | $ | 1,466 |
Schedule of depreciation period for each asset category | The following table presents the estimated useful lives for each asset category:
Asset Category | Estimated Useful Lives
Computer equipment and capitalized software | 1 to 5 years
Leasehold improvements | Lesser of asset life or life of lease
Furniture and other equipment | 7 years
Aircraft and automobile | 5 to 10 years

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