Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Breakdown between Current and Deferred Income Taxes (Detail)

v2.4.1.9
Summary of Significant Accounting Policies - Breakdown between Current and Deferred Income Taxes (Detail) (USD $)
3 Months Ended 12 Months Ended
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Accounting Policies [Abstract]                      
Current portion                     $ (268,356)us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred portion                   (743,676)us-gaap_DeferredIncomeTaxExpenseBenefit 568,675us-gaap_DeferredIncomeTaxExpenseBenefit
Total income taxes $ 6,399us-gaap_IncomeTaxExpenseBenefit $ 6,857us-gaap_IncomeTaxExpenseBenefit $ 6,623us-gaap_IncomeTaxExpenseBenefit $ 6,623us-gaap_IncomeTaxExpenseBenefit $ 1,328,297us-gaap_IncomeTaxExpenseBenefit $ 85,406us-gaap_IncomeTaxExpenseBenefit $ 46,838us-gaap_IncomeTaxExpenseBenefit $ 59,189us-gaap_IncomeTaxExpenseBenefit $ 26,502us-gaap_IncomeTaxExpenseBenefit $ 1,519,730us-gaap_IncomeTaxExpenseBenefit $ 300,319us-gaap_IncomeTaxExpenseBenefit