Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Common Stock	Additional Paid-in Capital	Unallocated common stock held by the ESOP	Retained Earnings	Accumulated Other Comprehensive Loss	Total
Balance at Dec. 31, 2017		$ 100		$ 61,832	$ (6,955)	$ 54,977
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income				616		616
Other comprehensive income (loss)					(1,074)	(1,074)
Balance at Mar. 31, 2018		100		62,448	(8,029)	54,519
Balance at Dec. 31, 2018		100		66,189	(7,012)	59,277
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income				911		911
Other comprehensive income (loss)					1,096	1,096
Common Stock and proceeds of offering	$ 111	(121)		45,875		45,865
Balance at Mar. 31, 2019	$ 111	$ (21)	$ (4,364)	$ 112,975	$ (5,916)	$ 102,785
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Unallocated common stock held by ESOP			(4,364)			(4,364)