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Income Taxes - Net Deferred Tax Assets (Details) - USD ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Deferred tax assets (liabilities): |  |
Net operating loss carryforwards | $ 62.1 | $ 27.3
Stock-based compensation | 0.4 | 0.4
Net unearned premium | 2.9 | 1.1
Startup costs | 1.0 | 0.6
Other | 0.4 | 0.0
Total gross deferred tax assets | 66.8 | 29.4
Deferred tax liabilities: |  |
Deferred acquisition costs | (0.4) | 0.0
Depreciation and amortization | (0.4) | 0.0
Total gross deferred tax liabilities | (0.8) | 0.0
Valuation allowance | (66.0) | (29.4)
Total deferred tax assets, net | $ 0.0 | $ 0.0

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