Annual report pursuant to Section 13 and 15(d)

PAYABLE TO LICENSOR (Details Textual)

v3.19.1
PAYABLE TO LICENSOR (Details Textual) - USD ($)
1 Months Ended
Nov. 04, 2018
Nov. 04, 2019
Dec. 31, 2018
Dec. 31, 2017
Payable Due Licensor Current     $ 10,000,000 $ 0
Payable Due Licensor Non current     $ 20,000,000 $ 0
REGENXBIO [Member] | Licensing Agreements [Member]        
Annual Fees $ 100,000,000      
Guranteed Upfront Payment 20,000,000      
Payable Due Licensor Non current $ 20,000,000 $ 20,000,000    
REGENXBIO [Member] | Scenario, Forecast [Member] | Licensing Agreements [Member]        
Payable Due Licensor Current   $ 10,000,000