Related Party Transactions (Details)	6 Months Ended
Jun. 30, 2012
Related Party Transactions [Abstract]
Cash holdings percentage for margin requirements used in interest income calculation (in hundredths)	100.00%
Cash holdings percentage not intended to meet margin requirements, used in the calculation of interest income (in hundredths)	100.00%

Percentage of average daily cash balance held on deposit with a related party, not intended for the purpose of meeting margin requirements, used in a calculation of interest income.

No definition available.

Name:	mscc_AverageDailyHoldingsPercentageInterestIncomeBasisRelatedPartyHoldingsNotForMarginRequirement
Namespace Prefix:	mscc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration