Loans and Allowance for Loan Losses (Details) - USD ($)	3 Months Ended		12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Jun. 30, 2019	Sep. 30, 2019	Jun. 30, 2019	Sep. 30, 2018
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning	$ 1,293,965	$ 1,324,159	$ 1,324,159
Charge-offs	(7,826)	(32,700)	(60,343)
Recoveries	535	10,351	30,149
Balance at Ending	1,286,674	1,301,810	1,293,965
Allowance
Ending balance individually evaluated for impairment				$ 136,116	$ 103,315	$ 189,557
Ending balance collectively evaluated for impairment				1,150,558	1,190,650	1,112,253
Ending balance				1,286,674	1,293,965	1,301,810
Loans
Ending balance individually evaluated for impairment				1,196,462	1,524,868	827,240
Ending balance collectively evaluated for impairment				251,218,103	259,642,500	263,216,444
Total loans				252,414,565	261,167,368	264,043,684
Less allowance	1,293,965	1,324,159	1,324,159	1,286,674	1,293,965	1,301,810
Total				251,127,891	259,873,403	262,741,874
Construction, Land, Development
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning	4,319	4,758	4,758
Provision	1,351	200	(439)
Balance at Ending	5,670	4,958	4,319
Allowance
Ending balance collectively evaluated for impairment				5,670	4,319	4,958
Ending balance				5,670	4,319	4,958
Loans
Ending balance collectively evaluated for impairment				5,670,043	4,318,845	4,957,594
Total loans				5,670,043	4,318,845	4,957,594
Less allowance	4,319	4,758	4,758	5,670	4,319	4,958
Total				5,664,373	4,314,526	4,952,636
1-4 Family Owner Occupied
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning	67,593	7,300	7,300
Recoveries	335	10,040	28,735
Provision	(11,124)	(11,189)	31,558
Balance at Ending	56,804	6,151	67,593
Allowance
Ending balance individually evaluated for impairment					5,772
Ending balance collectively evaluated for impairment				56,804	61,821	6,151
Ending balance				56,804	67,593	6,151
Loans
Ending balance individually evaluated for impairment				892,031	1,203,256	496,873
Ending balance collectively evaluated for impairment				113,611,576	123,642,066	123,051,883
Total loans				114,503,607	124,845,322	123,548,756
Less allowance	67,593	7,300	7,300	56,804	67,593	6,151
Total				114,446,802	124,777,729	123,542,605
1-4 Family Non-Owner Occupied
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning	26,630	71,053	71,053
Charge-offs		(30,492)	(44,534)
Provision	(603)	(16,019)	111
Balance at Ending	26,027	24,542	26,630
Allowance
Ending balance collectively evaluated for impairment				26,027	26,630	24,542
Ending balance				26,027	26,630	24,542
Loans
Ending balance collectively evaluated for impairment				20,493,732	20,968,812	22,936,292
Total loans				20,493,732	20,968,812	22,936,292
Less allowance	26,630	71,053	71,053	26,027	26,630	24,542
Total				20,467,705	20,942,182	22,911,750
Multifamily
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning	109,870	71,101	71,101
Provision	1,242	19	38,769
Balance at Ending	111,112	71,120	109,870
Allowance
Ending balance collectively evaluated for impairment				111,112	109,870	71,120
Ending balance				111,112	109,870	71,120
Loans
Ending balance collectively evaluated for impairment				74,074,709	73,246,392	71,120,014
Total loans				74,074,709	73,246,392	71,120,014
Less allowance	109,870	71,101	71,101	111,112	109,870	71,120
Total				73,963,597	73,136,522	71,048,894
Commercial Owner Occupied
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning	61,193	131,906	131,906
Provision	29,884	(793)	(70,713)
Balance at Ending	91,077	131,113	61,193
Allowance
Ending balance individually evaluated for impairment				74,737	44,564	116,602
Ending balance collectively evaluated for impairment				16,340	16,629	14,511
Ending balance				91,077	61,193	131,113
Loans
Ending balance individually evaluated for impairment				192,285	193,601	196,535
Ending balance collectively evaluated for impairment				8,170,283	8,314,410	7,255,700
Total loans				8,362,568	8,508,011	7,452,235
Less allowance	61,193	131,906	131,906	91,077	61,193	131,113
Total				8,271,491	8,446,818	7,321,122
Commercial Non-Owner Occupied
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning	738,366	925,355	925,355
Provision	34,820	(19,950)	(186,989)
Balance at Ending	773,186	905,405	738,366
Allowance
Ending balance collectively evaluated for impairment				773,186	738,366	905,405
Ending balance				773,186	738,366	905,405
Loans
Ending balance collectively evaluated for impairment				19,604,096	19,502,545	22,708,924
Total loans				19,604,096	19,502,545	22,708,924
Less allowance	738,366	925,355	925,355	773,186	738,366	905,405
Total				18,830,910	18,764,179	21,803,519
Consumer
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning	70,058	98,096	98,096
Charge-offs	(7,826)	(2,208)	(15,809)
Recoveries	200	311	1,414
Provision	10,076	15,124	(13,643)
Balance at Ending	72,508	111,323	70,058
Allowance
Ending balance individually evaluated for impairment				61,379	52,979	72,955
Ending balance collectively evaluated for impairment				11,129	17,079	38,368
Ending balance				72,508	70,058	111,323
Loans
Ending balance individually evaluated for impairment				112,146	128,011	133,832
Ending balance collectively evaluated for impairment				9,593,664	9,649,430	11,186,037
Total loans				9,705,810	9,777,441	11,319,869
Less allowance	70,058	98,096	98,096	72,508	70,058	111,323
Total				9,633,303	9,707,383	11,208,546
Not Specifically Allocated
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning	215,936	14,590	14,590
Provision	(65,646)	32,608	201,346
Balance at Ending	150,290	47,198	215,936
Allowance
Ending balance collectively evaluated for impairment				150,290	215,936	47,198
Ending balance				150,290	215,936	47,198
Loans
Less allowance	$ 215,936	$ 14,590	$ 14,590	150,290	215,936	47,198
Total				$ (150,290)	$ (215,936)	$ (47,198)