Stockholders' Equity (Schedule of Reconciliation of Numerators and Denominators of Basic and Diluted Per Share Computations) (Details) - USD ($)	3 Months Ended								12 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2018	Jun. 30, 2017
Numerator:
Net Income	$ 700,398	$ 317,764	$ 1,614,871	$ 442,764	$ 191,659	$ 279,173	$ 244,079	$ 420,825	$ 3,075,797	$ 1,135,736
Basic EPS:
Balance, beginning, shares				2,371,321				2,364,684	2,371,321	2,364,684
Unearned ESOP shares									(45,000)	(61,667)
Weighted average common shares issued during the period									4,685	4,465
Weighted average common shares purchased during the period									(3,075)	(879)
Weighted average ESOP shares earned during the period									5,954	6,267
Denominator for basic earnings per common shares - Weighted average common shares									2,333,885	2,312,870
Diluted EPS:
Weighted average dilutive effect of stock options									14,422	11,968
Denominator for diluted earnings per common shares - Weighted average common shares									2,348,307	2,324,838