Quarterly report pursuant to Section 13 or 15(d)

Related-Party Transactions - Summary of Management Fees, Incentive Fees and Associated Credits and Administration Fees (Detail)

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Related-Party Transactions - Summary of Management Fees, Incentive Fees and Associated Credits and Administration Fees (Detail) (USD $)
 3 Months Ended 6 Months Ended 9 Months Ended
Sep. 30, 2013
Mar. 31, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2013
Sep. 30, 2012
Management Fee:            
Allocated payroll and benefits     $ 124,208   $ 38,668 $ 189,026
Allocated overhead expenses     8,188   7,538 31,545
Prior management advisory fee     132,396   46,206 220,571
Amended base management fee 19,485       57,580  
Total management fee 19,485   132,396   103,786 220,571
Incentive Fee:            
Incentive Fee 0 41,037 0 0 41,037 0
Credit from voluntary, irrevocable waiver by Adviser's board of directors           (41,037)   
Net incentive fee                
Administration Fee:            
Allocated payroll and benefits     55,863   14,034 100,076
Allocated overhead expenses     10,352   4,498 25,185
Prior administration fee     66,215   18,532 125,261
Amended administration fee 39,562       116,870  
Total administration fee $ 39,562   $ 66,215   $ 135,402 $ 125,261