Schedule of Assumptions and Results for the Monte Carlo Simulation (Details) - USD ($) $ / shares in Units, $ in Thousands				6 Months Ended
		Mar. 31, 2024	Jan. 18, 2024	Mar. 31, 2024
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Performance period start				Oct. 02, 2023
Performance period start				Oct. 01, 2028
Term of simulation		1 year 3 months 18 days	1 year 6 months	5 years 5 months 1 day	[1]
Time steps in simulation				1,365
Time steps per year				252
Common share price at valuation date	[2]	$ 3.04		$ 3.04
Dividend yield	[3]			0.00%
Volatility (annual)		30.00%	30.00%	50.00%	[4]
Risk-free rate (annual)		5.27%	5.00%	3.37%	[5]
Cost of equity	[6]			11.50%
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	[1]			27,000
Fair value of one performance share	[7]	$ 2.75		$ 2.75
Total fair value of tranch		$ 74,345		$ 74,345
Derived service period	[7]			8 months 15 days
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	[1]			27,000
Fair value of one performance share	[7]	$ 2.58		$ 2.58
Total fair value of tranch		$ 69,742		$ 69,742
Derived service period	[7]			1 year 1 month 17 days
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	[1]			27,000
Fair value of one performance share	[7]	$ 2.39		$ 2.39
Total fair value of tranch		$ 64,446		$ 64,446
Derived service period	[7]			1 year 7 months 6 days
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	[1]			27,000
Fair value of one performance share	[7]	$ 2.18		$ 2.18
Total fair value of tranch		$ 58,819		$ 58,819
Derived service period	[7]			2 years 21 days
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	[1]			27,000
Fair value of one performance share	[7]	$ 1.93		$ 1.93
Total fair value of tranch		$ 52,238		$ 52,238
Derived service period	[7]			2 years 5 months 23 days

[1] Based on the terms of the Performance Shares agreement issued by the Company on May 3, 2023.

[2] Closing price of OPXS shares on the Valuation Date, as obtained via S&P Capital IQ.

[3] Expected dividends provided by management.

[4] Based on historical volatility of OPXS and comparable public companies.

[5] Interest rate for US Treasury commensurate with the Performance Shares holding period, as of the Valuation Date, as obtained via S&P Capital IQ.

[6] Estimated cost of equity for OPXS as of the Valuation Date.

[7] Based on Monte Carlo simulation.