XML 25 R13.htm IDEA: XBRL DOCUMENT v2.4.1.9
UNALLOCATED RESERVE AND DISTRIBUTIONS (Details) (USD $)
3 Months Ended
Apr. 30, 2015
Apr. 30, 2014
Jan. 31, 2015
UNALLOCATED RESERVE AND DISTRIBUTIONS      
Cash and U.S. Government securities $ 1,569,442msb_CashAndCashEquivalentsAndUSGovernmentSecurities   $ 9,484,275msb_CashAndCashEquivalentsAndUSGovernmentSecurities
Distribution payable     (8,396,806)us-gaap_InterestAndDividendsPayableCurrent
Unallocated cash and U.S. Government securities 1,569,442msb_UnallocatedCashAndCashEquivalentsAndUSGovernmentSecurities   1,087,469msb_UnallocatedCashAndCashEquivalentsAndUSGovernmentSecurities
Reconciliation of unallocated reserve      
Unallocated Reserve at the beginning of the period 1,611,124msb_UnallocatedReserve    
Net income 940,266us-gaap_NetIncomeLoss 137,218us-gaap_NetIncomeLoss  
Unallocated Reserve at the end of the period 2,551,390msb_UnallocatedReserve    
Minimum      
UNALLOCATED RESERVE AND DISTRIBUTIONS      
Unallocated cash and U.S. Government securities 500,000msb_UnallocatedCashAndCashEquivalentsAndUSGovernmentSecurities
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
   
Maximum      
UNALLOCATED RESERVE AND DISTRIBUTIONS      
Unallocated cash and U.S. Government securities $ 1,000,000msb_UnallocatedCashAndCashEquivalentsAndUSGovernmentSecurities
/ us-gaap_RangeAxis
= us-gaap_MaximumMember