Intangible Assets - Details of Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jul. 31, 2014	Jan. 31, 2014
Finite Lived Intangible Assets [Line Items]
Intangible assets, Gross Carrying Amount	$ 7,574	$ 7,574
Intangible assets, Accumulated Amortization	(1,847)	(1,023)
Intangible assets, Net	5,727	6,551
Data update technology [Member]
Finite Lived Intangible Assets [Line Items]
Intangible assets, Gross Carrying Amount	3,680	3,680
Intangible assets, Accumulated Amortization	(820)	(452)
Intangible assets, Net	2,860	3,228
Remaining Useful Life (in years)	3 years 10 months 24 days	4 years 4 months 24 days
Database [Member]
Finite Lived Intangible Assets [Line Items]
Intangible assets, Gross Carrying Amount	2,570	2,570
Intangible assets, Accumulated Amortization	(716)	(394)
Intangible assets, Net	1,854	2,176
Remaining Useful Life (in years)	2 years 10 months 24 days	3 years 4 months 24 days
Customer relationships [Member]
Finite Lived Intangible Assets [Line Items]
Intangible assets, Gross Carrying Amount	1,020	1,020
Intangible assets, Accumulated Amortization	(189)	(104)
Intangible assets, Net	831	916
Remaining Useful Life (in years)	4 years 10 months 24 days	5 years 4 months 24 days
Software [Member]
Finite Lived Intangible Assets [Line Items]
Intangible assets, Gross Carrying Amount	304	304
Intangible assets, Accumulated Amortization	(122)	(73)
Intangible assets, Net	$ 182	$ 231
Remaining Useful Life (in years)	1 year 9 months 18 days	2 years 3 months 18 days