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Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	12 Months Ended
	Jan. 31, 2014
Summary Of Significant Accounting Policies [Line Items]
Management agreement, initial term	20 years
Computer and Software
Summary Of Significant Accounting Policies [Line Items]
Property plant and equipment, useful life	3 years
Furniture and fixtures
Summary Of Significant Accounting Policies [Line Items]
Property plant and equipment, useful life	8 years
Machinery and Equipment
Summary Of Significant Accounting Policies [Line Items]
Property plant and equipment, useful life	5 years
Medical Malpractise Insurance
Summary Of Significant Accounting Policies [Line Items]
Malpractice Insurance, Coverage Floor	$ 1,000,000
Malpractice Insurance, Annual Coverage Limit	$ 3,000,000