| Balance Sheet Components |
Balance Sheet Components Accounts Receivable, Net Accounts receivable are recorded for invoiced amounts and amounts for which revenue has been recognized, but not invoiced, net of allowances. Our short-term accounts receivable consist of the following: | | | | | | | | | | | | | As of | | July 31, 2021 | | January 31, 2021 | | | | | | (in thousands) | | Accounts receivable, gross | $ | 429,895 | | | $ | 331,547 | | | Less: allowance for credit losses | (17,500) | | | (20,500) | | | Less: allowance for returns | (17,129) | | | (16,344) | | | Accounts receivable, net | $ | 395,266 | | | $ | 294,703 | |
Below is a rollforward of our allowance for credit losses for the six months ended July 31, 2021 and 2020: | | | | | | | | | | | | | | | | | | | | | 2021 | | 2020 | | (in thousands) | | Balance as of January 31 | $ | 20,500 | | | $ | 5,150 | | | Provision for credit losses | 8,029 | | | 13,723 | | | Write-offs | (11,029) | | | (1,373) | | | Balance as of July 31 | $ | 17,500 | | | $ | 17,500 | |
Prepaid Expenses and Other Current Assets Prepaid expenses and other current assets consisted of the following: | | | | | | | | | | | | | As of | | July 31, 2021 | | January 31, 2021 | | | | | | (in thousands) | | Prepaid expenses | $ | 87,428 | | | $ | 60,702 | | | Restricted cash from international employee stock sales | 63,185 | | | 50,475 | | | | | | | Other | 21,675 | | | 5,642 | | | Prepaid expenses and other current assets | $ | 172,288 | | | $ | 116,819 | |
Property and Equipment, Net Property and equipment consisted of the following: | | | | | | | | | | | | | As of | | July 31, 2021 | | January 31, 2021 | | | | | | (in thousands) | | Computer and office equipment | $ | 183,778 | | | $ | 137,445 | | | Software | 49,353 | | | 36,216 | | | Leasehold improvements | 24,493 | | | 23,593 | | | Furniture and fixtures | 4,477 | | | 4,625 | | | Property and equipment, gross | 262,101 | | | 201,879 | | | Less: accumulated depreciation and amortization | (68,249) | | | (51,955) | | | Property and equipment, net | $ | 193,852 | | | $ | 149,924 | |
Depreciation and amortization expense was $11.8 million and $6.4 million for the three months ended July 31, 2021 and 2020, respectively, and $22.3 million and $11.7 million for the six months ended July 31, 2021 and 2020, respectively. Other Assets, Noncurrent Other assets, noncurrent consisted of the following: | | | | | | | | | | | | | As of | | July 31, 2021 | | January 31, 2021 | | | | | | (in thousands) | | Accounts receivable, noncurrent | $ | 32,224 | | | $ | 28,008 | | | | | | | Prepaid expenses, noncurrent | 20,341 | | | 12,386 | | | | | | | | | | | | | | | | | | | Other | 16,997 | | | 16,891 | | | Other assets, noncurrent | $ | 69,562 | | | $ | 57,285 | |
Accrued Expenses and Other Current Liabilities Accrued expenses and other current liabilities consisted of the following: | | | | | | | | | | | | | As of | | July 31, 2021 | | January 31, 2021 | | | | | | (in thousands) | | | | | | Accrued expenses | $ | 230,311 | | | $ | 157,167 | | | Accrued compensation and benefits | 100,376 | | | 118,640 | | | Proceeds from employee equity transactions to be remitted to employees and tax authorities | 73,074 | | | 54,174 | | | Sales and other tax liabilities | 32,992 | | | 27,453 | | | Operating lease liabilities, current | 17,355 | | | 15,601 | | | Customer deposit liabilities | 14,541 | | | 13,050 | | | | | | | Other | 13,513 | | | 6,933 | | | Accrued expenses and other current liabilities | $ | 482,162 | | | $ | 393,018 | |
Other Liabilities, Noncurrent Other liabilities, noncurrent consisted of the following: | | | | | | | | | | | | | As of | | July 31, 2021 | | January 31, 2021 | | | | | | (in thousands) | | Sales and other tax liabilities | $ | 54,187 | | | $ | 58,133 | | | | | | | | | | | | | | | Other | 3,697 | | | 3,501 | | | Other liabilities, noncurrent | $ | 57,884 | | | $ | 61,634 | |
|