Segment Reporting	6 Months Ended
	Jul. 31, 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. As a result, no segment reporting is required. The Marine Technology Products business 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.