Fair Value of Financial Instruments - Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Assets and Liabilities Measured at Fair Value on Recurring Basis
Investment securities available for sale, at fair value	$ 6,393	$ 8,628
Fair Value, Measurements, Recurring
Assets and Liabilities Measured at Fair Value on Recurring Basis
Interest rate contracts - assets	34	5
Interest rate contracts - liabilities	(34)	(5)
Investment securities available for sale, at fair value	6,393	8,628
Fair Value, Measurements, Recurring | Level 2
Assets and Liabilities Measured at Fair Value on Recurring Basis
Interest rate contracts - assets	34	5
Interest rate contracts - liabilities	(34)	(5)
Investment securities available for sale, at fair value	$ 6,393	$ 8,628