Quarterly report pursuant to Section 13 or 15(d)

Stock-based Compensation - Stock-based Compensation Expense Recognized (Detail)

v2.4.1.9
Stock-based Compensation - Stock-based Compensation Expense Recognized (Detail) (USD $)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]    
Total Stock based compensation $ 112,140us-gaap_EmployeeBenefitsAndShareBasedCompensation $ 5,545us-gaap_EmployeeBenefitsAndShareBasedCompensation
Research and Development Expense [Member]    
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]    
Total Stock based compensation 20,917us-gaap_EmployeeBenefitsAndShareBasedCompensation
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_ResearchAndDevelopmentExpenseMember
10,037us-gaap_EmployeeBenefitsAndShareBasedCompensation
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_ResearchAndDevelopmentExpenseMember
Selling, General and Administrative Expenses [Member]    
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]    
Total Stock based compensation $ 91,223us-gaap_EmployeeBenefitsAndShareBasedCompensation
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_SellingGeneralAndAdministrativeExpensesMember
$ (4,492)us-gaap_EmployeeBenefitsAndShareBasedCompensation
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_SellingGeneralAndAdministrativeExpensesMember