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Schedule of Warranty Reserves (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 29, 2026 | Mar. 30, 2025 | Mar. 29, 2026 | Mar. 30, 2025
Accounting Policies [Abstract] |  |  |  |  |
Beginning balance |  | $ 168 | $ 22 | $ 162 | $ 52
Incurred costs for warranties satisfied during the period |  |  |  |  |
Warranties reserved for new product shipped during the period | [1] |  | 13 | 6 | 25
Change in estimate for pre-existing warranty liabilities | [2] | (143) | 71 | (143) | 29
Warranty Expense |  | (143) | 84 | (137) | 54
Ending balance |  | $ 25 | $ 106 | $ 25 | $ 106
[1] | Warranty expenses accrued to cost of sales (based on current period shipments and historical warranty return rate.)
[2] | Changes in estimated warranty liabilities recognized in cost of sales associated with: the period end customer returned warranty backlog, or the actual costs of repaired/replaced warranty units which were shipped to the customer during the current period.

X
- Definition Product warranty accrual reserved for new product shipping. + References No definition available. + Details
Name: | OPXS_ProductWarrantyAccrualReservedForNewProductShipping
Namespace Prefix: | OPXS_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of warranty costs incurred during the period. + References No definition available. + Details
Name: | OPXS_ProductWarrantyAccrualWarrantyCosts
Namespace Prefix: | OPXS_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition A reserve for the estimated amount of expense related to a warranty on a specific product or service accrued at the time of sale based on historic statistical data. + References No definition available. + Details
Name: | OPXS_WarrantyReserve
Namespace Prefix: | OPXS_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of increase (decrease) in the standard and extended product warranty liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482425/460-10-50-8 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of increase (decrease) in the standard and extended product warranty accrual from changes in estimates attributable to preexisting product warranties. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (c)(4) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482425/460-10-50-8 + Details
Name: | us-gaap_ProductWarrantyAccrualPreexistingIncreaseDecrease
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration