Debt - Narrative (Details)		3 Months Ended	6 Months Ended	12 Months Ended
	Dec. 21, 2023 USD ($)	Dec. 31, 2023 USD ($) lender	Mar. 31, 2024 USD ($) customer	Sep. 30, 2023 USD ($)	Nov. 08, 2023 USD ($)
Line of Credit Facility [Line Items]
Debt instrument, number of lenders | lender		2
Number of customer invoices factored | customer			1
Foreign subsidiary borrowings, net of unamortized debt issuance cost
Line of Credit Facility [Line Items]
Receivables pledged as collateral			$ 1,914,000	$ 1,247,000
Long-term debt, gross			$ 10,656,000	5,771,000
Foreign subsidiary borrowings, net of unamortized debt issuance cost | Euribor | Minimum
Line of Credit Facility [Line Items]
Euribor variable interest rates			0.50%
Foreign subsidiary borrowings, net of unamortized debt issuance cost | Euribor | Maximum
Line of Credit Facility [Line Items]
Euribor variable interest rates			8.00%
First Loan
Line of Credit Facility [Line Items]
Face amount		$ 2,208,000
Debt instrument, term		7 years
Quarterly payment		$ 200,000
Second Loan
Line of Credit Facility [Line Items]
Face amount		$ 1,104,000
Debt instrument, term		1 year 6 months
Revolving credit agreement | Revolving credit agreement
Line of Credit Facility [Line Items]
Revolving line of credit, accumulated amortization of debt issuance costs			$ 86,000	78,000
Remaining unamortized amount			86,000
Long-term debt, gross			17,518,000	16,289,000
Revolving credit agreement | Credit Agreement | Revolving credit agreement
Line of Credit Facility [Line Items]
Reserves under borrowing base			1,500,000	1,500,000	$ 1,500,000
Revolving credit facility, maximum borrowing capacity	$ 19,000,000		$ 26,000,000	30,000,000
Commitment fee percentage			0.50%
Receivables pledged as collateral			$ 23,223,000	21,089,000
Remaining borrowing capacity			3,711,000	2,830,000
Letters of credit outstanding, amount			$ 1,970,000	$ 1,970,000
Weighted average interest rate, revolving credit facility			8.20%	7.70%
Debt issuance costs incurred in period		$ 117,000
Revolving line of credit, accumulated amortization of debt issuance costs			$ 44,000
Revolving credit agreement | Credit Agreement | Revolving credit agreement | SOFR
Line of Credit Facility [Line Items]
Basis spread			2.75%	2.25%
Revolving credit agreement | Credit Agreement and Export Credit Facility | Revolving credit agreement
Line of Credit Facility [Line Items]
Revolving credit facility, maximum borrowing capacity	23,000,000
Revolving credit agreement | Export Credit Facility | Revolving credit agreement
Line of Credit Facility [Line Items]
Weighted average interest rate, revolving credit facility			7.70%	7.20%
Revolving credit agreement | Export Credit Facility | Revolving credit agreement | SOFR
Line of Credit Facility [Line Items]
Basis spread			2.25%	1.75%
Subordinated note | Director
Line of Credit Facility [Line Items]
Long-term debt, gross			$ 3,256,000	$ 0
Subordinated note | Subordinated Promissory Note | Director
Line of Credit Facility [Line Items]
Reserves under borrowing base	1,500,000
Face amount	$ 3,000,000
Borrowing base calculation, percentage	85.00%
Borrowing base, percentage of eligible inventory	70.00%
Monthly increase in reserves under borrowing base	$ 250,000
Commitment fee percentage	0.50%
Available funds paid to borrowers	$ 3,000,000
Interest rate	14.00%		14.00%	0.00%
Fully earned and non-refundable fee	$ 150,000
Long-term debt, gross			$ 3,256,000	$ 0
Guaranty fee	$ 760,000
Subordinated note | Subordinated Promissory Note | CBFR | Director
Line of Credit Facility [Line Items]
Basis spread	2.75%
Subordinated note | Subordinated Promissory Note | CB Floating Rate | Director
Line of Credit Facility [Line Items]
Basis spread	0.25%
Subordinated note | Subordinated Promissory Note | SOFR | Director
Line of Credit Facility [Line Items]
Basis spread	2.75%