Leases (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2017	Jul. 31, 2016	Jan. 31, 2017
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2017 (six months remaining)	$ 518		$ 518
2018	1,050		1,050
2019	978		978
2020	515		515
2021	521		521
Thereafter	445		445
Total	4,027		4,027
Rent expense	312	$ 328	625	$ 646
Fixed assets acquired under capital leases	134		134		$ 134
Accumulated depreciation	126		126		$ 104
Facilities
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2017 (six months remaining)	512		512
2018	1,039		1,039
2019	967		967
2020	504		504
2021	519		519
Thereafter	445		445
Total	3,986		3,986
Equipment
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2017 (six months remaining)	6		6
2018	11		11
2019	11		11
2020	11		11
2021	2		2
Thereafter	0		0
Total	$ 41		$ 41