Assets Held for Sale and Discontinued Operations - Schedule of Discontinued Operations, Cash Flow (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2020	Jul. 31, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss on disposal of discontinued operations			$ 1,859	$ 0
Discontinued Operations, Held-for-sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Depreciation and amortization			1,771	2,519
Gross profit from sale of lease pool equipment			(1,324)	(743)
Provision for doubtful accounts	$ 470	$ 0	470	0
Loss on disposal of discontinued operations	$ 1,859	$ 0	1,859	0
Sale of used lease pool equipment			1,988	1,133
Purchase of seismic equipment held for lease			$ (110)	$ (229)