Consolidated Statements Of Comprehensive Income (Parenthetical) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010
Consolidated Statements Of Comprehensive Income
Unrealized losses on long-term investments, tax (benefit)	$ 741	$ (500)	$ 83

Tax effect of the temporary and non-credit based other-than-temporary losses on long-term investments.

No definition available.

Name:	mcrs_TemporaryAndNonCreditOtherThanTemporaryLossesOnLongTermInvestmentsTax
Namespace Prefix:	mcrs_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration