Significant Accounting Policies (Details) - USD ($)	1 Months Ended	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020	Sep. 30, 2019
Acquired Indefinite-lived Intangible Assets [Line Items]
Estimated useful live of intangible assets				10 years
Goodwill	$ 67,144,000	$ 65,643,000		$ 65,643,000		$ 65,450,000	$ 52,758,000
Goodwill impairment	0
Uncertain tax positions	$ 0	0		0
Income tax interest expense		0	$ 0	0	$ 0
Income tax penalties expense		0	$ 0	0	$ 0
Cash, FDIC insured amount		$ 250,000		$ 250,000
Treasury stock (in shares)	0	0		0
Preferred shares authorized (in shares)		5,000,000		5,000,000
Preferred stock issued (in shares)	0	0		0
Employee Stock Option
Acquired Indefinite-lived Intangible Assets [Line Items]
Number of awards authorized for issuance (in shares)		0		0
Expiration term of share-based compensation plan				10 years
Minimum
Acquired Indefinite-lived Intangible Assets [Line Items]
Estimated useful of long-lived assets				3 years
Maximum
Acquired Indefinite-lived Intangible Assets [Line Items]
Estimated useful of long-lived assets				7 years