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Income Taxes - Reconciliation of Federal Statutory Income Tax Rate to Company's Effective Tax Rate (Details) | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Income Tax Disclosure [Abstract] |  |
Federal statutory income tax rate | 21.00% | 21.00%
State income taxes, net of federal tax effect | 6.30% | 0.80%
Change in uncertain tax benefits | (0.60%) | (8.00%)
Stock based compensation – restricted stock | 2.00% | (7.50%)
Return to provision adjustment | (0.70%) | 4.80%
Permanent differences | 1.10% | (9.80%)
Tax credits | (2.70%) | 10.80%
CARES Act carryback | (0.094) | 0
Other | 0.00% | 1.60%
Effective tax rate | 17.00% | 13.70%

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