Leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Leases [Abstract]
Lease expense	$ 302	$ 204	$ 417
Future lease payments for operating leases with initial or remaining noncancelable term of one year or more [Abstract]
2020	114
2021	15
2021	1
2023 and thereafter	0
Total minimum payments required	130
Right-of-use asset	$ 127
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherAssets
Lease liability	$ 127
Operating Lease, Liability, Statement of Financial Position [Extensible List]	us-gaap:AccountsPayableAndOtherAccruedLiabilities