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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2019
Income Tax Disclosure [Abstract] |
Schedule of Domestic and Foreign Components of Income Before Income Taxes | The domestic and foreign components of income before income taxes are as follows:
|  | Year Ended December 31, |
|  | 2019 |  |  | 2018 |  |  | 2017 |
United States |  | $ | 37,476 |  |  | $ | 24,426 |  |  | $ | 15,543 |
Foreign |  |  | 1,229 |  |  |  | 1,058 |  |  |  | 294 |
Income before income taxes |  | $ | 38,705 |  |  | $ | 25,484 |  |  | $ | 15,837 |
Schedule of (Benefit From) Provision for Income Taxes | The (benefit from) provision for income taxes contained the following components:
|  | Year Ended December 31, |
|  | 2019 |  |  | 2018 |  |  | 2017 |
Current (benefit) provision: |  |  |  |  |  |  |  |  |  |  |  |
Federal |  | $ | — |  |  | $ | (860 | ) |  | $ | 3,262 |
State |  |  | (220 | ) |  |  | 92 |  |  |  | 431 |
Foreign |  |  | 513 |  |  |  | 122 |  |  |  | 62 |
|  |  | 293 |  |  |  | (646 | ) |  |  | 3,755 |
Deferred (benefit) provision: |  |  |  |  |  |  |  |  |  |  |  |
Federal |  |  | (2,377 | ) |  |  | (27,675 | ) |  |  | (755 | )
State |  |  | (1,306 | ) |  |  | (11,499 | ) |  |  | (343 | )
Foreign |  |  | (51 | ) |  |  | 134 |  |  |  | (19 | )
|  |  | (3,734 | ) |  |  | (39,040 | ) |  |  | (1,117 | )
Income tax (benefit) provision |  | $ | (3,441 | ) |  | $ | (39,686 | ) |  | $ | 2,638 |
Schedule of Effective Tax Rates Less than US Federal Statutory Rate Primarily Due to Excess Tax Deductions | The Company's effective tax rates for the years ending December 31, 2019 and 2018 are less than the U.S. federal statutory rate due to excess tax deductions related to stock-based compensation awards and federal and state research and development credits. The Company’s effective tax rate for the year ending December 31, 2017 is less than the U.S. federal statutory rate primarily due to federal and state research and development credits, excess tax deductions related to stock-based compensation awards, and tax deductions for fees incurred during the IPO process.
|  | Year Ended December 31, |
|  | 2019 |  |  | 2018 |  |  | 2017 |
U.S. federal taxes at statutory rate |  |  | 21.0 | % |  |  | 21.0 | % |  |  | 35.0 | %
State taxes, net of federal benefit |  |  | 0.2 |  |  |  | (25.6 | ) |  |  | 3.1 |
Nondeductible expenses |  |  | 2.9 |  |  |  | 4.1 |  |  |  | 1.2 |
Tax deductible IPO costs |  |  | — |  |  |  | — |  |  |  | (9.3 | )
Stock compensation |  |  | (22.0 | ) |  |  | (127.2 | ) |  |  | (4.4 | )
Foreign rate differential |  |  | (0.3 | ) |  |  | (0.4 | ) |  |  | (0.4 | )
Credits |  |  | (10.3 | ) |  |  | (28.4 | ) |  |  | (9.0 | )
Other |  |  | (0.2 | ) |  |  | 0.7 |  |  |  | 0.5 |
Total |  |  | (8.7 | )% |  |  | (155.8 | )% |  |  | 16.7 | %
Schedule of Income Tax Effect of Each Type of Temporary Difference and Carryforward | The approximate income tax effect of each type of temporary difference and carryforward as of December 31, 2019 and 2018 is as follows:
|  | As of December 31, |
|  | 2019 |  |  | 2018 |
Deferred tax assets: |  |  |  |  |  |  |  |
Net operating loss carryforwards |  | $ | 35,977 |  |  | $ | 34,450 |
Credit carryforwards |  |  | 10,472 |  |  |  | 6,562 |
Stock-based compensation |  |  | 2,953 |  |  |  | 1,945 |
Landlord allowance on leasehold improvements |  |  | — |  |  |  | 1,908 |
Lease liability |  |  | 17,965 |  |  |  | — |
Intangible Assets |  |  | 62 |  |  |  | — |
Deferred rent |  |  | — |  |  |  | 873 |
Accruals and reserves |  |  | 1,185 |  |  |  | 1,074 |
|  |  | 68,614 |  |  |  | 46,812 |
Valuation Allowance |  |  | (62 | ) |  |  | — |
|  |  | 68,552 |  |  |  | 46,812 |
Deferred tax liabilities: |  |  |  |  |  |  |  |
Prepaid expenses |  |  | (1,523 | ) |  |  | (931 | )
Deferred commissions |  |  | (5,100 | ) |  |  | (3,187 | )
Right of use assets |  |  | (15,270 | ) |  |  | — |
Unbilled revenue |  |  | — |  |  |  | (227 | )
Fixed assets |  |  | (4,230 | ) |  |  | (3,581 | )
|  |  | (26,123 | ) |  |  | (7,926 | )
Net deferred tax assets |  | $ | 42,429 |  |  | $ | 38,886 |

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