Net Income (Loss) per Share (Narrative) (Details) - shares	Jan. 31, 2016	Jan. 31, 2015
Net Income (Loss) per Share [Abstract]
Unexpired options for the purchase of common shares and unvested restricted and performance stock awards	420,874	278,693

Share Based Compensation Arrangement By Share Based Payment Award Options And Other Than Options Nonvested Number

No definition available.

Name:	mgcd_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndOtherThanOptionsNonvestedNumber
Namespace Prefix:	mgcd_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant