Leases (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2016	Jul. 31, 2015	Jan. 31, 2016
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2016 (six months remaining)	$ 495		$ 495
2017	1,018		1,018
2018	1,050		1,050
2019	978		978
2020	515		515
Thereafter	966		966
Total	5,022		5,022
Rent expense	328	$ 325	646	$ 632
Fixed assets	1,652		1,652		$ 1,652
Accumulated depreciation	1,521		1,521		$ 1,166
Facilities
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2016 (six months remaining)	489		489
2017	1,007		1,007
2018	1,039		1,039
2019	967		967
2020	504		504
Thereafter	964		964
Total	4,970		4,970
Equipment
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2016 (six months remaining)	6		6
2017	11		11
2018	11		11
2019	11		11
2020	11		11
Thereafter	2		2
Total	$ 52		$ 52