Leases - Leased Assets (Details) - USD ($)	3 Months Ended	9 Months Ended
	Oct. 31, 2019	Oct. 31, 2019
Costs associated with leased assets
Operating lease cost	$ 54,000	$ 171,000
Sublease income	(72,000)	(216,000)
Total operating lease income	$ (18,000)	$ (45,000)