Condensed Consolidated Statements of Stockholders' Equity (unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid -in Capital	Unearned ESOP Shares	Retained Earnings	Accumulated Other Comprehensive Income, net of tax
Beginning balance (in shares) at Dec. 31, 2018		2,544,059
Beginning balance at Dec. 31, 2018	$ 71,627	$ 25	$ 25,663	$ (340)	$ 46,165	$ 114
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	3,261				3,261
Other comprehensive income, net of tax	73					73
Share-based compensation	87		87
Restricted stock awards issued (in shares)		15,925
Restricted stock awards issued	0
Cash dividends paid on common stock	(716)				(716)
Common stock surrendered (in shares)		(2,778)
Common stock surrendered	0
Common stock options exercised (in shares)		6,282
Common stock options exercised	38		38
Allocation of ESOP shares	195		138	57
Ending balance (in shares) at Jun. 30, 2019		2,563,488
Ending balance at Jun. 30, 2019	74,565	$ 25	25,926	(283)	48,710	187
Beginning balance (in shares) at Mar. 31, 2019		2,563,828
Beginning balance at Mar. 31, 2019	72,923	$ 25	25,802	(312)	47,252	156
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,817				1,817
Other comprehensive income, net of tax	31					31
Share-based compensation	48		48
Cash dividends paid on common stock	(359)				(359)
Common stock surrendered (in shares)		(1,290)
Common stock surrendered	0
Restricted shares forfeited	0
Common stock options exercised (in shares)		950
Common stock options exercised	6		6
Allocation of ESOP shares	99		70	29
Ending balance (in shares) at Jun. 30, 2019		2,563,488
Ending balance at Jun. 30, 2019	$ 74,565	$ 25	25,926	(283)	48,710	187
Beginning balance (in shares) at Dec. 31, 2019	2,567,389	2,567,389
Beginning balance at Dec. 31, 2019	$ 77,726	$ 25	26,343	(227)	51,410	175
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	3,108				3,108
Other comprehensive income, net of tax	87					87
Share-based compensation	231		231
Restricted stock awards issued (in shares)		13,600
Restricted stock awards issued	0
Cash dividends paid on common stock	(1,294)				(1,294)
Common stock surrendered (in shares)		(581)
Common stock surrendered	0
Restricted shares forfeited (in shares)		(1,690)
Restricted shares forfeited	0
Common stock options exercised (in shares)		14,434
Common stock options exercised	216		216
Allocation of ESOP shares	$ 161		104	57
Ending balance (in shares) at Jun. 30, 2020	2,593,152	2,593,152
Ending balance at Jun. 30, 2020	$ 80,235	$ 25	26,894	(170)	53,224	262
Beginning balance (in shares) at Mar. 31, 2020		2,591,494
Beginning balance at Mar. 31, 2020	78,247	$ 25	26,776	(198)	51,488	156
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	2,128				2,128
Other comprehensive income, net of tax	106					106
Share-based compensation	46		46
Cash dividends paid on common stock	(389)				(389)
Common stock surrendered (in shares)		(581)
Common stock surrendered	0
Restricted shares forfeited (in shares)		(1,510)
Restricted shares forfeited	0
Common stock options exercised (in shares)		3,749
Common stock options exercised	34		34
Allocation of ESOP shares	$ 63		38	28	(3)
Ending balance (in shares) at Jun. 30, 2020	2,593,152	2,593,152
Ending balance at Jun. 30, 2020	$ 80,235	$ 25	$ 26,894	$ (170)	$ 53,224	$ 262