Summary of Significant Accounting Policies (Details) - USD ($)	3 Months Ended		12 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2019	Oct. 01, 2019	Sep. 30, 2018
Accounting Policies [Abstract]
Goodwill impairment expense	$ 0			$ 6,976,000	$ 0
Deferred financing cost amortization			$ 198,000	152,000	318,000
Debt Issuance Costs, Noncurrent, Net	(656,000)		(656,000)	(736,000)
Accounts Receivable, Allowance for Credit Loss	(2,387,000)		(2,387,000)	(2,613,000)
Deferred tax assets	$ 19,009,000		19,009,000	33,803,000
Loss Contingency, Undiscounted Amount of Insurance-related Assessment Liability			3,266,000	$ 3,886,000
Accrual for Loss Contingencies, Undiscounted, First Year			1,047,000
Accrual for Loss Contingencies, Undiscounted, Second Year			714,000
Accrual for Loss Contingencies, Undiscounted, Third Year			452,000
Accrual for Loss Contingencies, Undiscounted, Fourth Year			285,000
Accrual for Loss Contingencies, Undiscounted, Fifth Year			167,000
Accrual for Insurance Loss Contingencies, Undiscounted, after Fifth Year			$ 601,000
Loss Contingency Accrual, Insurance-related Assessment, Discount Rate	1.00%		1.00%	0.30%
Accrued Insurance, Current	$ 3,234,000		$ 3,234,000	$ 3,832,000
Liability for Claims and Claims Adjustment Expense, Disability, Accident and Health	2,553,000		2,553,000	2,422,000
Letters of Credit Outstanding, Amount	4,527,000		4,527,000
Redeemable Noncontrolling Interest, Equity, Redemption Value	18,262,000		18,262,000
Noncontrolling Interest, Change in Redemption Value			(315,000)		(80,000)
Operating right of use assets	42,916,000		42,916,000	31,786,000		$ 32,434,000
Operating Lease, Liability	42,623,000		42,623,000			$ 32,237,000
Financing Receivable, Allowance for Credit Loss [Line Items]
Accounts Receivable, Allowance for Credit Loss	2,387,000		2,387,000	2,613,000
Payments for Repurchase of Redeemable Noncontrolling Interest		$ 1,188,000	1,188,000
Increase (Decrease) in Deferred Income Taxes			70,000
Stockholders' Equity Attributable to Parent	345,953,000		345,953,000	283,313,000	246,248,000		$ 220,407,000
Accounting Standards Update 2016-13
Financing Receivable, Allowance for Credit Loss [Line Items]
Accounts Receivable, Allowance for Credit Loss, Current	284,000		284,000
Accounts Receivable, Allowance for Credit Loss, Current	284,000		284,000
Trade Accounts Receivable
Accounting Policies [Abstract]
Accounts Receivable, Allowance for Credit Loss	(2,387,000)		(2,387,000)	(2,613,000)	(1,184,000)
Financing Receivable, Allowance for Credit Loss [Line Items]
Accounts Receivable, Allowance for Credit Loss	$ 2,387,000		2,387,000	2,613,000	$ 1,184,000
Addition to costs and expenses			1,216,000	1,864,000
Deductions for uncollectible receivables written off, net of recoveries			$ (1,442,000)	$ (435,000)