| Real Estate and Intangible Assets - Future Operating Lease Payments from Tenants under Non-Cancelable Leases (Detail) (USD $) | Sep. 30, 2013 | 
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| Real Estate [Abstract] | |
| For the remaining three months ending December 31: 2013 | $ 880,645 | 
| For the fiscal years ending December 31: 2014 | 3,796,267 | 
| 2015 | 3,166,142 | 
| 2016 | 3,142,955 | 
| 2017 | 2,975,351 | 
| 2018 | 2,703,066 | 
| Thereafter | $ 5,728,667 | 
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- Definition Operating leases future minimum payments due in six years. No definition available. 
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- Definition Amount of required minimum rental payments maturing in the next fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount of required minimum rental payments maturing in the fifth fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount of required minimum rental payments maturing in the forth fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount of required minimum rental payments maturing in the third fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount of required minimum rental payments maturing in the second fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount of required minimum rental payments maturing after the fifth fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Details 
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