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Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended
Income Taxes - Additional Information (Detail) (USD $)	Apr. 30, 2015	Jan. 31, 2015
Income Tax Disclosure [Abstract]
Prepaid income taxes	$ 1,551,000us-gaap_PrepaidTaxes	$ 1,018,000us-gaap_PrepaidTaxes
Prepaid foreign taxes	1,500,000mind_PrepaidForeignTaxes	900,000mind_PrepaidForeignTaxes
Prepaid domestic federal and state taxes	100,000	100,000
Deferred tax asset	$ 125,000
Federal statutory rate	34.00%

- Definition

Amount of asset related to consideration paid in advance for income and other taxes that provide economic benefits within a future period of one year or the normal operating cycle, if longer.

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