Annual report pursuant to Section 13 and 15(d)

STOCK-BASED COMPENSATION (Details 5)

v2.4.1.9
STOCK-BASED COMPENSATION (Details 5) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Unrecognized compensation expense, additional disclosures    
Unrecognized compensation expense related to unvested employee restricted stock unit $ 604,321us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions  
Allocation of stock-based compensation expense, by title of individuals    
Stock-based compensation expense 1,029,774us-gaap_AllocatedShareBasedCompensationExpense  
Common stock options    
Unrecognized compensation expense, additional disclosures    
Weighted average period 3 years 2 months 12 days  
Allocation of stock-based compensation expense, by title of individuals    
Stock-based compensation expense 697,211us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
0us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
Restricted stock units    
Unrecognized compensation expense, additional disclosures    
Weighted average period 1 year 7 months 6 days  
Allocation of stock-based compensation expense, by title of individuals    
Stock-based compensation expense 332,563us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
 
Research and development expenses | Employees    
Allocation of stock-based compensation expense, by title of individuals    
Stock-based compensation expense 320,114us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_ResearchAndDevelopmentExpenseMember
/ us-gaap_TitleOfIndividualAxis
= resn_EmployeesMember
 
Research and development expenses | Non-employees    
Allocation of stock-based compensation expense, by title of individuals    
Stock-based compensation expense 71,528us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_ResearchAndDevelopmentExpenseMember
/ us-gaap_TitleOfIndividualAxis
= resn_NonemployeesMember
 
General and administrative expenses | Non-employees    
Allocation of stock-based compensation expense, by title of individuals    
Stock-based compensation expense 224,399us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_GeneralAndAdministrativeExpenseMember
/ us-gaap_TitleOfIndividualAxis
= resn_NonemployeesMember
 
General and administrative expenses | Employees and directors    
Allocation of stock-based compensation expense, by title of individuals    
Stock-based compensation expense $ 413,733us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_GeneralAndAdministrativeExpenseMember
/ us-gaap_TitleOfIndividualAxis
= resn_EmployeesAndDirectorsMember