Leases - Supplemental Balance Sheet Information (Details) $ in Thousands	Dec. 31, 2019 USD ($)
Leases [Abstract]
Operating lease ROU assets	$ 5,550
Operating lease ROU assets, Statement of Financial Position [Extensible List]	us-gaap:PublicUtilitiesPropertyPlantAndEquipmentPlantInService
Operating lease liabilities, current	$ 513
Operating lease liabilities, current, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesCurrent
Operating lease liabilities, noncurrent	$ 5,094
Operating lease liabilities, noncurrent, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesNoncurrent
Total lease liabilities	$ 5,607
Weighted average remaining lease terms	11 years 10 months 28 days
Weighted average discount rate	4.66%