Summary of Significant Accounting Policies - Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share for Out of Money Potential Common Shares (Detail) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Stock Options With an Exercise Price of $1.04 per Share [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Out of the money options and warrants excluded	1,652,000		1,652,000
Stock Options With an Exercise Price of $1.07 per Share [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Out of the money options and warrants excluded	50,000		50,000
Stock Options With an Exercise Price of $1.74 per Share [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Out of the money options and warrants excluded		51,750		51,750
Stock Options With an Exercise Price of $2.20 per Share [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Out of the money options and warrants excluded	952,444	969,610	952,444	969,610
Stock Options With an Exercise Price of $2.73 per Share [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Out of the money options and warrants excluded	644,469	644,469	644,469	644,469
Stock Options With an Exercise Price of $2.74 per Share [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Out of the money options and warrants excluded	609,399	633,835	609,399	633,835
Stock Options With an Exercise Price of $2.89 per Share [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Out of the money options and warrants excluded	944,482	983,822	944,482	983,822
Stock Options With an Exercise Price of $3.25 per Share [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Out of the money options and warrants excluded	100,000	100,000	100,000	100,000
Stock Options With an Exercise Price of $3.40 per Share [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Out of the money options and warrants excluded		100,000		100,000
Stock Options With an Exercise Price of $3.43 per Share [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Out of the money options and warrants excluded	40,000	40,000	40,000	40,000
Stock Options With an Exercise Price of $3.50 per Share [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Out of the money options and warrants excluded	100,000	100,000	100,000	100,000
Stock Options With an Exercise Price of $3.90 per Share [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Out of the money options and warrants excluded	20,000	20,000	20,000	20,000
Warrants With an Exercise Price of $3.60 per Share [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Out of the money options and warrants excluded	1,562,500	1,562,500	1,562,500	1,562,500
Options and Warrants Excluded from Diluted EPS [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Out of the money options and warrants excluded	6,675,294	5,205,986	6,675,294	5,205,986