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Summary of Stock-Based Compensation Expense Related To Restricted Stock and Option Awards (Detail) (USD $)	3 Months Ended
	Apr. 30, 2013	Apr. 30, 2012
Summary Of Stock Based Compensation Expense Related To Restricted Stock and Option Awards [Line Items]
Stock-based compensation expense	$ 623,226	$ 104,134
Cost of services
Summary Of Stock Based Compensation Expense Related To Restricted Stock and Option Awards [Line Items]
Stock-based compensation expense	147,895	61,254
General and administrative
Summary Of Stock Based Compensation Expense Related To Restricted Stock and Option Awards [Line Items]
Stock-based compensation expense	$ 475,331	$ 42,880

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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