Annual report pursuant to Section 13 and 15(d)

Unaudited Quarterly Financial Information - Summary of the Company's Unaudited Quarterly Results of Operations (Detail)

v2.4.1.9
Unaudited Quarterly Financial Information - Summary of the Company's Unaudited Quarterly Results of Operations (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
Quarterly Financial Information Disclosure [Abstract]                    
Revenue $ 220,504us-gaap_Revenues $ 201,010us-gaap_Revenues $ 303,752us-gaap_Revenues $ 214,660us-gaap_Revenues $ 434,784us-gaap_Revenues $ 253,374us-gaap_Revenues $ 167,668us-gaap_Revenues $ 176,407us-gaap_Revenues $ 939,926us-gaap_Revenues $ 1,032,233us-gaap_Revenues
Total operating expenses 1,360,155us-gaap_OperatingExpenses 1,162,148us-gaap_OperatingExpenses 2,080,663us-gaap_OperatingExpenses 1,783,858us-gaap_OperatingExpenses 3,428,793us-gaap_OperatingExpenses 9,465,455us-gaap_OperatingExpenses 2,156,279us-gaap_OperatingExpenses 1,848,582us-gaap_OperatingExpenses 6,386,824us-gaap_OperatingExpenses 16,899,109us-gaap_OperatingExpenses
Net loss $ (1,223,572)us-gaap_NetIncomeLoss $ (1,029,544)us-gaap_NetIncomeLoss $ (1,895,519)us-gaap_NetIncomeLoss $ (1,640,884)us-gaap_NetIncomeLoss $ (3,079,335)us-gaap_NetIncomeLoss $ (9,325,424)us-gaap_NetIncomeLoss $ (2,074,035)us-gaap_NetIncomeLoss $ (1,589,960)us-gaap_NetIncomeLoss $ (5,789,519)us-gaap_NetIncomeLoss $ (16,068,754)us-gaap_NetIncomeLoss
Loss per share:                    
Basic and Diluted $ (0.03)us-gaap_EarningsPerShareBasicAndDiluted $ (0.03)us-gaap_EarningsPerShareBasicAndDiluted $ (0.05)us-gaap_EarningsPerShareBasicAndDiluted $ (0.05)us-gaap_EarningsPerShareBasicAndDiluted $ (0.09)us-gaap_EarningsPerShareBasicAndDiluted $ (0.34)us-gaap_EarningsPerShareBasicAndDiluted $ (0.08)us-gaap_EarningsPerShareBasicAndDiluted $ (0.06)us-gaap_EarningsPerShareBasicAndDiluted $ (0.16)us-gaap_EarningsPerShareBasicAndDiluted $ (0.56)us-gaap_EarningsPerShareBasicAndDiluted