Quarterly report [Sections 13 or 15(d)]

Schedule of Assumptions and Results for the Monte Carlo Simulation for the Market-based Shares (Details)

v3.26.1
Schedule of Assumptions and Results for the Monte Carlo Simulation for the Market-based Shares (Details)
$ / shares in Units, $ in Thousands
 6 Months Ended
Mar. 29, 2026
USD ($)
$ / shares
shares
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]  
Performance period start Dec. 18, 2025
Performance period end Sep. 30, 2030
Time steps in simulation 1,205
Time steps per year 252
Common share price at valuation date $ 13.60 [1]
Dividend yield 0.00% [2]
Volatility (annual) 52.50% [3]
Risk-free rate (annual) 3.64% [4]
Cost of equity 12.00% [5]
Share-Based Payment Arrangement, Tranche One [Member]  
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]  
Number of performance shares in the tranche | shares 13,500 [6]
Fair value of one performance share $ 12.08 [7]
Total fair value of tranche | $ $ 163,051
Derived service period 7 months 28 days [7]
Share-Based Payment Arrangement, Tranche Two [Member]  
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]  
Number of performance shares in the tranche | shares 13,500 [6]
Fair value of one performance share $ 11.16 [7]
Total fair value of tranche | $ $ 150,633
Derived service period 1 year 1 month 13 days [7]
Share-Based Payment Arrangement, Tranche Three [Member]  
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]  
Number of performance shares in the tranche | shares 13,500 [6]
Fair value of one performance share $ 10.12 [7]
Total fair value of tranche | $ $ 136,669
Derived service period 1 year 6 months 29 days [7]
Share Based Compensation Award Tranche Four [Member]  
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]  
Number of performance shares in the tranche | shares 13,500 [6]
Fair value of one performance share $ 9.02 [7]
Total fair value of tranche | $ $ 121,713
Derived service period 2 years 3 days [7]
Share Based Compensation Award Tranche Five [Member]  
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]  
Number of performance shares in the tranche | shares 13,500 [6]
Fair value of one performance share $ 7.90 [7]
Total fair value of tranche | $ $ 106,662
Derived service period 2 years 4 months 13 days [7]
[1] Closing price of OPXS shares on the Valuation Date, as obtained via S&P Capital IQ.
[2] Expected dividends provided by management.
[3] Based on historical volatility of OPXS and comparable public companies.
[4] Interest rate for US Treasury commensurate with the market-based shares holding period, as of the Valuation Date, as obtained via S&P Capital IQ.
[5] Estimated cost of equity for OPXS as of the Valuation Date.
[6] Based on the terms of the Market-Based shares agreement issued by the Company on December 18, 2025 and effective December 18, 2025.
[7] Based on Monte Carlo simulation.