Summary of Significant Accounting Policies - Narrative (Details) $ in Thousands	12 Months Ended
	Sep. 30, 2023 USD ($) customer shares	Sep. 30, 2022 USD ($) customer shares
Accounting Policies [Line Items]
Allowance for doubtful accounts	$ 242	$ 111
Accounts receivable, allowance for credit loss, writeoffs	16	53
Bad debt expense (benefit)	$ 143	$ (3)
Percentage of inventory estimated using LIFO method	19.00%	42.00%
Net realizable value reserves	$ 669	$ 1,538
Obsolete and excess inventory valuation reserves, net of writedown	3,380	3,546
Depreciation expense	$ 6,170	$ 6,035
Anti-dilutive weighted-average common shares excluded from calculation of diluted earnings per share (in shares) | shares	202,000	270,000
Benefit from employee retention credit	$ 1,772
Proceeds from employee retention credit refund	1,688
Employee retention credit interest income	84
Employee retention credit manufacturing credit	1,452
Employee retention credit costs	236
Employee retention credit professional fees	$ 354
Restricted shares
Accounting Policies [Line Items]
Anti-dilutive weighted-average common shares excluded from calculation of diluted earnings per share (in shares) | shares	0	0
Minimum
Accounting Policies [Line Items]
Finite-lived intangible asset, useful life (in years)	1 year
Maximum
Accounting Policies [Line Items]
Finite-lived intangible asset, useful life (in years)	10 years
Building and Building Improvements | Minimum
Accounting Policies [Line Items]
Property, plant and equipment, useful life (in years)	5 years
Building and Building Improvements | Maximum
Accounting Policies [Line Items]
Property, plant and equipment, useful life (in years)	40 years
Machinery and Equipment | Minimum
Accounting Policies [Line Items]
Property, plant and equipment, useful life (in years)	3 years
Machinery and Equipment | Maximum
Accounting Policies [Line Items]
Property, plant and equipment, useful life (in years)	20 years
Computer Software | Minimum
Accounting Policies [Line Items]
Property, plant and equipment, useful life (in years)	3 years
Computer Software | Maximum
Accounting Policies [Line Items]
Property, plant and equipment, useful life (in years)	7 years
Leasehold Improvements | Minimum
Accounting Policies [Line Items]
Property, plant and equipment, useful life (in years)	6 years
Leasehold Improvements | Maximum
Accounting Policies [Line Items]
Property, plant and equipment, useful life (in years)	15 years
Customer Concentration Risk | Sales Revenue, Net | Customer One
Accounting Policies [Line Items]
Percentage of concentration risk	12.00%	11.00%
Number of major customers | customer	1	1
Customer Concentration Risk | Sales Revenue, Net | Total Customers and Their Subcontractors
Accounting Policies [Line Items]
Percentage of concentration risk	32.00%	23.00%
Number of major customers | customer	3	2
Customer Concentration Risk | Sales Revenue, Net | Major Customer One and Their Subcontractors
Accounting Policies [Line Items]
Percentage of concentration risk	12.00%	12.00%
Customer Concentration Risk | Sales Revenue, Net | Major Customer Two and Their Subcontractors
Accounting Policies [Line Items]
Percentage of concentration risk	10.00%	11.00%
Customer Concentration Risk | Sales Revenue, Net | Major Customer Three and Their Subcontractors
Accounting Policies [Line Items]
Percentage of concentration risk	10.00%
Customer Concentration Risk | Accounts Receivable | Customer One
Accounting Policies [Line Items]
Percentage of concentration risk	11.00%
Number of major customers | customer	1
Customer Concentration Risk | Accounts Receivable | Total Customers and Their Subcontractors
Accounting Policies [Line Items]
Percentage of concentration risk	13.00%
Number of major customers | customer	1	4
Customer Concentration Risk | Accounts Receivable | Major Customer One and Their Subcontractors
Accounting Policies [Line Items]
Percentage of concentration risk		15.00%
Customer Concentration Risk | Accounts Receivable | Major Customer Two and Their Subcontractors
Accounting Policies [Line Items]
Percentage of concentration risk		11.00%
Customer Concentration Risk | Accounts Receivable | Major Customer Three and Their Subcontractors
Accounting Policies [Line Items]
Percentage of concentration risk		11.00%
Customer Concentration Risk | Accounts Receivable | Major Customer Four and Their Subcontractors
Accounting Policies [Line Items]
Percentage of concentration risk		10.00%
Customer Concentration Risk | Accounts Receivable | Three Largest Customers
Accounting Policies [Line Items]
Number of major customers | customer		3
Customer Concentration Risk | Accounts Receivable | Customer One
Accounting Policies [Line Items]
Percentage of concentration risk		15.00%
Customer Concentration Risk | Accounts Receivable | Customer Two
Accounting Policies [Line Items]
Percentage of concentration risk		11.00%
Customer Concentration Risk | Accounts Receivable | Customer Three
Accounting Policies [Line Items]
Percentage of concentration risk		10.00%