Revenue from Contracts with Customers - Revenue Disaggregation (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2019	Jan. 31, 2018
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	$ 25,768	$ 0
Revenue recognized at a point in time
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	24,992	0
Revenue recognized over time
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	776	0
Seamap | Revenue recognized at a point in time
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	15,213	0
Seamap | Revenue recognized over time
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	776	0
Klein | Revenue recognized at a point in time
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	6,515	0
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	3,264	0
SAP | Revenue recognized over time
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	$ 0	$ 0