Summary of Business and Significant Accounting Policies - Schedule of Certain Risks and Concentrations of Credit Risk (Detail)	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended
	Apr. 30, 2014 Accounts receivable [Member] Customer 1 [Member]	Jan. 31, 2014 Accounts receivable [Member] Customer 1 [Member]	Apr. 30, 2014 Accounts receivable [Member] Customer 2 [Member]	Jan. 31, 2014 Accounts receivable [Member] Customer 2 [Member]	Apr. 30, 2014 Revenues [Member] Customer 1 [Member]	Apr. 30, 2013 Revenues [Member] Customer 1 [Member]	Apr. 30, 2014 Revenues [Member] Customer 2 [Member]	Apr. 30, 2013 Revenues [Member] Customer 2 [Member]
Concentration Risk [Line Items]
Concentrations of credit risk, percentage				10.00%		10.00%		10.00%