Options - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended	1 Months Ended	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended			12 Months Ended					12 Months Ended	0 Months Ended		9 Months Ended	1 Months Ended	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Jan. 31, 2012 Stock Option	Sep. 30, 2013 Stock Option	Sep. 30, 2012 Stock Option	Sep. 30, 2013 Stock Option	Sep. 30, 2012 Stock Option	Sep. 30, 2013 Stock Options After Stockholder Approval	Sep. 30, 2012 Stock Options After Stockholder Approval	Sep. 30, 2013 Stock Options After Stockholder Approval	Sep. 30, 2012 Stock Options After Stockholder Approval	Sep. 30, 2013 Stock Options Granted In 2011	Dec. 31, 2011 CFO service 1 Stock Options After Stockholder Approval	Dec. 31, 2011 CFO service 2 Stock Options After Stockholder Approval	Jan. 31, 2012 On date three months after Initial Vesting Date and on such date every third month thereafter Stock Option	Dec. 31, 2011 On date three months after Initial Vesting Date and on such date every third month thereafter Stock Options After Stockholder Approval	Jan. 31, 2012 Members of Management and Directors Stock Option	Dec. 31, 2011 Members of Management and Directors Stock Options After Stockholder Approval	Sep. 03, 2013 Chief Financial Officer	Apr. 07, 2013 Chief Financial Officer	Sep. 30, 2013 Chief Financial Officer	Apr. 30, 2012 Chief Financial Officer Stock Option	Sep. 30, 2013 Chief Financial Officer Stock Option	Sep. 30, 2012 Chief Financial Officer Stock Option	Sep. 30, 2013 Chief Financial Officer Stock Option	Sep. 30, 2012 Chief Financial Officer Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option grants															5,000,000
Options granted						1,300,000							1,620,000			30,000	120,000				1,470,000				120,000
Options granted, exercise price						$ 1.22										$ 2.59	$ 2.27				$ 2.59				$ 1.49
Options granted, exercise period from grant date			7 years 9 months 14 days		8 years 4 months 6 days	10 years										10 years	10 years				10 years				10 years
Options granted, exercisable percentage																100.00%	25.00%	6.25%	6.25%	25.00%	25.00%
Fair value assumptions, volatility rate						124.81%										125.22%	125.22%				125.22%				124.50%
Fair value assumptions, risk free interest rate						1.98%										2.17%	2.17%				2.17%				2.23%
Fair value assumptions, expected term						10 years										9 years 6 months	9 years 6 months				9 years 6 months				10 years
Fair value of options						$ 1,516,435										$ 36,062	$ 144,892				$ 1,767,017				$ 170,967
Stock compensation expense	375,002	379,450	1,133,790	1,047,355			94,777	94,777	284,332	284,332	110,439	110,439	331,316	367,539								169,786	305,614	475,400		0	42,742	42,742	85,483
Outstanding vested stock options, shares															1,676,250
Outstanding vested stock options, weighted average period															8 years 7 months 24 days
Unvested stock options, shares															1,363,750
Unvested stock options, weighted average period															7 years 11 months 12 days
Unrecorded stock-based compensation expenses															$ 1,515,626