| 
           Related-Party Transactions - Summary of Management Fees, Incentive Fees and Associated Credits and Administration Fees (Detail) (USD $) 
         | 
        3 Months Ended | |
|---|---|---|
| 
           Mar. 31, 2014 
         | 
        
           Mar. 31, 2013 
         | 
      |
| Management Fee: | ||
| Allocated payroll and benefits | $ 38,668 | |
| Allocated overhead expenses | 7,538 | |
| Prior management advisory fee | 46,206 | |
| Amended base management fee | 240,964 | 12,958 | 
| Total management fee | 240,964 | 59,164 | 
| Incentive Fee: | ||
| Incentive Fee | 0 | 41,037 | 
| Net incentive fee | 41,037 | |
| Administration Fee: | ||
| Allocated payroll and benefits | 14,034 | |
| Allocated overhead expenses | 4,498 | |
| Prior administration fee | 18,532 | |
| Amended administration fee | 66,158 | 19,800 | 
| Total administration fee | $ 66,158 | $ 38,332 | 
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- Definition 
          Administration fee allocated overhead expenses. No definition available. 
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- Definition 
          Administration fee allocated payroll and benefits. No definition available. 
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- Definition 
          Management advisory fee allocated overhead expenses. No definition available. 
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- Definition 
          Management advisory fee allocated payroll and benefits. No definition available. 
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- Definition 
          Related party transaction administration fee. No definition available. 
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- Details 
          
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- Definition 
          Related party transaction amended administration fee. No definition available. 
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- Definition 
          Related party transaction amended base management fee. No definition available. 
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- Definition 
          Related party transaction incentive fee. No definition available. 
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- Details 
          
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- Details 
          
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- Definition 
          Related party transaction management fee paid. No definition available. 
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- Definition 
          Related party transaction net incentive fee. No definition available. 
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- Definition 
          Related party transaction prior administration fee. No definition available. 
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- Definition 
          Related party transaction prior management advisory fee. No definition available. 
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