Segment Reporting	3 Months Ended
	Apr. 30, 2021
Segment Reporting [Abstract]
Segment Reporting	Segment ReportingWith the designation of the Equipment Leasing segment as discontinued operations as of July 31, 2020, the Company operates in one segment, Marine Technology Products. The Marine Technology Products segment is engaged in the design, manufacture and sale of state-of-the-art seismic and offshore telemetry systems. Manufacturing, support and sales facilities are maintained in the United Kingdom, Singapore, Malaysia and the states of New Hampshire and Texas.