v3.21.1

Summary of Significant Accounting Policies (Tables) | 3 Months Ended
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Mar. 31, 2021
Summary of Significant Accounting Policies |
Schedule of roll forward of the allowance for doubtful accounts |
|  | Three Months Ended
|  | March 31, |  | March 31,
|  | 2021 |  | 2020
Allowance for doubtful accounts, beginning of period |  | $ | 27,162 |  | $ | 2,467
Bad debt expense |  |  | 8,098 |  | $ | 24,411
Allowance for doubtful accounts, end of period |  | $ | 35,260 |  | $ | 26,878
Schedule of estimated useful lives of property and equipment |
|  | Useful Lives
|  | (in years)
Vehicles |  | 5-10
Equipment |  | 5-7
Buildings |  | 15
Leasehold improvements |  | 5
Office equipment |  | 5-7

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