Income Taxes (Details 6) $ in Thousands	Dec. 31, 2017 USD ($)
Income Tax Disclosure [Line Items]
Net operating loss	$ 41,688
2020 - 2023
Income Tax Disclosure [Line Items]
Net operating loss	8,228
2024 - 2029
Income Tax Disclosure [Line Items]
Net operating loss	9,063
2030 - 2031
Income Tax Disclosure [Line Items]
Net operating loss	6,205
2032 - 2036
Income Tax Disclosure [Line Items]
Net operating loss	10,016
2037
Income Tax Disclosure [Line Items]
Net operating loss	$ 8,176