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Share-Based Compensation - Additional Information (Detail) (USD $)
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3 Months Ended | 9 Months Ended | 12 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | |||||||||||||||
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Sep. 30, 2014
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Sep. 30, 2013
Employees
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Sep. 30, 2014
Incentive_Plan
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Sep. 30, 2013
Employees
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Dec. 31, 2012
JSOP Awards [Member]
Employees
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Dec. 31, 2010
JSOP Awards [Member]
Employees
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Sep. 30, 2014
2012 JSOP [Member]
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Sep. 30, 2013
2012 JSOP [Member]
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Sep. 30, 2014
2012 JSOP [Member]
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Sep. 30, 2013
2012 JSOP [Member]
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Dec. 31, 2012
2012 JSOP [Member]
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Sep. 30, 2014
Non-Employee Stock Options [Member]
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Sep. 30, 2013
Non-Employee Stock Options [Member]
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Sep. 30, 2014
Non-Employee Stock Options [Member]
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Sep. 30, 2013
Non-Employee Stock Options [Member]
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Sep. 30, 2014
Common Stock Awards [Member]
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Sep. 30, 2013
Common Stock Awards [Member]
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Sep. 30, 2014
Common Stock Awards [Member]
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Sep. 30, 2013
Common Stock Awards [Member]
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Sep. 30, 2014
Employees [Member]
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Sep. 30, 2014
Employees [Member]
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Sep. 30, 2014
Employee Stock Options [Member]
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Dec. 31, 2013
Employee Stock Options [Member]
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Sep. 30, 2013
Employee Stock Options [Member]
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Sep. 30, 2014
Employee Stock Options [Member]
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Sep. 30, 2013
Employee Stock Options [Member]
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Sep. 30, 2014
Other Employees [Member]
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Sep. 30, 2013
Other Employees [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||||||||||||||||||||||||
| Share-based compensation | $ 246,258 | $ 123,374 | $ 678,508 | $ 336,275 | $ 0 | $ 70,446 | $ 344,905 | $ 209,040 | $ 128,650 | $ 3,716 | $ 140,096 | $ 18,270 | $ 25,500 | $ 25,504 | $ 76,500 | $ 61,341 | ||||||||||||
| Number of incentive stock plans | 2 | |||||||||||||||||||||||||||
| Acquisition date | Jan. 23, 2014 | |||||||||||||||||||||||||||
| Options granted | 0 | 0 | 0 | 0 | 37,218 | 81,562 | 104,637 | 187,896 | 100,000 | 100,000 | 1,920,000 | 1,920,000 | ||||||||||||||||
| Share-based compensation | 56,347 | 56,347 | 92,108 | 23,708 | 117,007 | 47,624 | ||||||||||||||||||||||
| Number of employees granted stock options | 1 | 1 | ||||||||||||||||||||||||||
| Option forfeited | 1,920,000 | |||||||||||||||||||||||||||
| Options exercised | 0 | 0 | 0 | 0 | 1,984,080 | 0 | 0 | |||||||||||||||||||||
| Cash received from stock options exercises | 101,933 | |||||||||||||||||||||||||||
| Awards authorized but not issued | 0 | 0 | ||||||||||||||||||||||||||
| Awards issued | 8,986,281 | 1,701,913 | ||||||||||||||||||||||||||
| Number of employees, shares issued under JSOP | 2 | 2 | ||||||||||||||||||||||||||
| Fair value of award | $ 853,889 | |||||||||||||||||||||||||||