Segment Reporting - Financial Information by Business Segment (Assets) (Detail) - USD ($) $ in Thousands	Oct. 31, 2017	Jan. 31, 2017
Segment Reporting Information [Line Items]
Total Assets	$ 76,797	$ 94,714
Operating Segments [Member] | Equipment Manufacturing and Sales [Member]
Segment Reporting Information [Line Items]
Total Assets	39,258	37,294
Operating Segments [Member] | Equipment Leasing [Member]
Segment Reporting Information [Line Items]
Total Assets	37,602	57,544
Eliminations [Member]
Segment Reporting Information [Line Items]
Total Assets	$ (63)	$ (124)