Revenue from Contracts with Customers - Revenue Disaggregation (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2021	Jan. 31, 2020
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	$ 21,215	$ 29,919
Revenue recognized at a point in time
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	20,449	29,186
Revenue recognized over time
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	766	733
Seamap | Revenue recognized at a point in time
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	16,304	21,617
Seamap | Revenue recognized over time
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	766	733
Klein | Revenue recognized at a point in time
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	4,145	7,468
Klein | Revenue recognized over time
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0
SAP | Revenue recognized at a point in time
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	101
SAP | Revenue recognized over time
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	$ 0	$ 0