Income Taxes - Additional Information (Detail) - USD ($)		12 Months Ended		18 Months Ended
	Jan. 01, 2021	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021
Income Tax Disclosure [Line Items]
Deferred tax asset		$ 42,701,000	$ 47,806,000	$ 42,701,000
Tax Cuts and Jobs Act, percentage of depreciation for certain fixed assets acquired		100.00%
Income Tax Disclosure [Abstract]
Net change in valuation allowance		$ 100,000	$ (100,000)
Unrecognized income tax benefits		$ 0		0
State
Income Tax Disclosure [Abstract]
Net operating loss carry forwards	$ 1,800,000
State | Minimum
Income Tax Disclosure [Abstract]
Expiration date of net operating loss carryforward	Dec. 31, 2023
State | Maximum
Income Tax Disclosure [Abstract]
Expiration date of net operating loss carryforward	Dec. 31, 2037
Federal
Income Tax Disclosure [Abstract]
Number of years for examination		4 years
New York
Income Tax Disclosure [Abstract]
Number of years for examination		4 years
Connecticut
Income Tax Disclosure [Abstract]
Number of years for examination		4 years
Pennsylvania
Income Tax Disclosure [Abstract]
Number of years for examination		4 years
New Jersey
Income Tax Disclosure [Abstract]
Number of years for examination		5 years
CARES Act
Income Tax Disclosure [Line Items]
Deferral payment of social security taxes				5,200,000
Deferred tax asset		$ 1,500,000		$ 1,500,000