Income Taxes - Schedule of Operating Loss Carryforward (Details) $ in Thousands	Dec. 31, 2017 USD ($)
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 23,319
2019-2024
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	5,132
2025-2031
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	6,993
2032-2037
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	2,200
Indefinite
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 8,995