Acquisition of AdvantageMS - Details of Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross Carrying Amount	$ 7,380
Intangible assets, Accumulated Amortization	(973)
Intangible assets, Net	6,551
Data update technology [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross Carrying Amount	3,680
Intangible assets, Accumulated Amortization	(452)
Intangible assets, Net	3,228
Remaining Useful Life (in years)	4 years 4 months 24 days
Database [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross Carrying Amount	2,570
Intangible assets, Accumulated Amortization	(394)
Intangible assets, Net	2,176
Remaining Useful Life (in years)	3 years 4 months 24 days
Customer relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross Carrying Amount	1,020
Intangible assets, Accumulated Amortization	(104)
Intangible assets, Net	916
Remaining Useful Life (in years)	5 years 4 months 24 days
Software [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross Carrying Amount	110
Intangible assets, Accumulated Amortization	(23)
Intangible assets, Net	$ 87
Remaining Useful Life (in years)	2 years 4 months 24 days