Income Taxes - Schedule of Federal Net Operating Loss Carryforward Expirations (Details) $ in Thousands	Dec. 31, 2018 USD ($)
Income Tax Disclosure [Line Items]
Net operating loss	$ 45,081
2020 - 2023
Income Tax Disclosure [Line Items]
Net operating loss	8,227
2024 - 2029
Income Tax Disclosure [Line Items]
Net operating loss	9,063
2030 - 2032
Income Tax Disclosure [Line Items]
Net operating loss	9,926
2033 - 2036
Income Tax Disclosure [Line Items]
Net operating loss	6,296
2037
Income Tax Disclosure [Line Items]
Net operating loss	8,116
No expiration but subject to limitation
Income Tax Disclosure [Line Items]
Net operating loss	$ 3,453