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Debt - Narrative (Details) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2021 USD ($) customer lender | Mar. 31, 2021 | Sep. 30, 2021 USD ($)
Line of Credit Facility [Line Items] |  |  |
Number of customer invoices factored | customer | 1 |  |
Foreign subsidiary borrowings |  |  |
Line of Credit Facility [Line Items] |  |  |
Receivables pledged as collateral | $ 491,000 |  | $ 485,000
Remaining debt balance | $ 5,866,000 |  | 6,632,000
Foreign subsidiary borrowings | Euribor | Minimum |  |  |
Line of Credit Facility [Line Items] |  |  |
Euribor variable interest rates | 1.00% |  |
Foreign subsidiary borrowings | Euribor | Maximum |  |  |
Line of Credit Facility [Line Items] |  |  |
Euribor variable interest rates | 4.20% |  |
First Loan |  |  |
Line of Credit Facility [Line Items] |  |  |
Debt instrument, number of lenders | lender | 1 |  |
Face amount | $ 1,141,000 |  |
Debt instrument, term | 6 years |  |
Quarterly payment | $ 56,000 |  |
Revolving credit agreement | Credit Agreement |  |  |
Line of Credit Facility [Line Items] |  |  |
Receivables pledged as collateral | $ 23,328,000 |  | $ 25,370,000
Percent availability under revolving commitment | 10.00% |  | 10.00%
Revolving credit agreement | Credit Agreement | Revolving credit agreement |  |  |
Line of Credit Facility [Line Items] |  |  |
Revolving credit facility, maximum borrowing capacity | $ 35,000,000 |  | $ 35,000,000
Remaining borrowing capacity | $ 12,157,000 |  | $ 14,570,000
Weighted average interest rate, revolving credit facility | 2.30% |  | 1.80%
Commitment fee percentage | 0.25% |  |
Revolving credit agreement | Credit Agreement | Revolving credit agreement | LIBOR |  |  |
Line of Credit Facility [Line Items] |  |  |
Basis spread on LIBOR | 2.25% |  | 1.75%
Revolving credit agreement | Export Credit Facility | Revolving credit agreement |  |  |
Line of Credit Facility [Line Items] |  |  |
Weighted average interest rate, revolving credit facility | 1.30% |  | 1.30%
Revolving credit agreement | Export Credit Facility | Revolving credit agreement | LIBOR |  |  |
Line of Credit Facility [Line Items] |  |  |
Basis spread on LIBOR | 1.25% | 1.25% |
Revolving credit agreement | 2018 Credit Agreement | Revolving credit agreement |  |  |
Line of Credit Facility [Line Items] |  |  |
Remaining unamortized amount | $ 86,000 |  |
Revolving line of credit, accumulated amortization of debt issuance costs | 24,000 |  | $ 17,000
Unsecured Promissory Note | PPP Loan | JPMorgan Chase Bank, N.A. |  |  |
Line of Credit Facility [Line Items] |  |  |
Remaining debt balance | $ 4,764,000 |  | $ 4,764,000

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- Definition Amount of accumulated amortization of debt issuance costs related to line of credit arrangements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section S45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=68176171&loc=SL68176184-208336 + Details
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- Definition Amount of assets pledged to secure a debt instrument. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=123599511&loc=d3e64711-112823 + Details
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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1B -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=124435984&loc=d3e28551-108399 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124429444&loc=SL124452920-239629 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 55 -Paragraph 69C -URI http://asc.fasb.org/extlink&oid=123466577&loc=SL123495737-112612 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 55 -Paragraph 69B -URI http://asc.fasb.org/extlink&oid=123466577&loc=SL123495735-112612 + Details
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