Fair Values of Financial Instruments - Recurring (Details) - Recurring - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Assets measured on a recurring basis
Total Investment Securities	$ 6,823	$ 5,781
Mortgage-Backed Securities | FHLMC
Assets measured on a recurring basis
Total Investment Securities	3,383	3,022
Mortgage-Backed Securities | FNMA
Assets measured on a recurring basis
Total Investment Securities	170	230
Mortgage-Backed Securities | GNMA
Assets measured on a recurring basis
Total Investment Securities	538	620
SBA 7a Pools
Assets measured on a recurring basis
Total Investment Securities	2,732	1,909
Level 2
Assets measured on a recurring basis
Total Investment Securities	6,823	5,781
Level 2 | Mortgage-Backed Securities | FHLMC
Assets measured on a recurring basis
Total Investment Securities	3,383	3,022
Level 2 | Mortgage-Backed Securities | FNMA
Assets measured on a recurring basis
Total Investment Securities	170	230
Level 2 | Mortgage-Backed Securities | GNMA
Assets measured on a recurring basis
Total Investment Securities	538	620
Level 2 | SBA 7a Pools
Assets measured on a recurring basis
Total Investment Securities	$ 2,732	$ 1,909