Basis of Statement Presentation Income Tax (Details) - USD ($)	3 Months Ended	8 Months Ended
Apr. 30, 2020	Dec. 31, 2020
Income Tax Disclosure [Abstract]
CARES Act, Current Payroll Tax Deferral	$ 130,000
CARES Act, Future Payroll Tax Deferral		$ 2,000,000

On March 27, 2020, in response to the COVID-19 pandemic, the Coronavirus Aid, Relief, and Economic Security Act (the “CARES Act”) was signed into U.S. law. The CARES Act provides for, among other things, deferral of the employer portion of social security taxes incurred through the end of calendar 2020.

No definition available.

Name:	odc_CARESActCurrentPayrollTaxDeferral
Namespace Prefix:	odc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration