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Commitments and Contingencies (Details Textual) (USD $)
 1 Months Ended 3 Months Ended 147 Months Ended 3 Months Ended 3 Months Ended
Jul. 31, 2008
Mar. 31, 2014
Mar. 31, 2013
Mar. 31, 2014
Mar. 31, 2014
Westminster, Colorado
Aug. 01, 2013
Westminster, Colorado
sqft
Mar. 31, 2014
Broomfield, Colorado
Commitments and Contingencies (Textual) [Abstract]              
Area of office facilities taken on lease           5,300  
Lease expiry period         Sep. 30, 2016   Sep. 30, 2013
Lease term         3 years    
Rent expense   $ 19,000 $ 12,000 $ 597,000      
Clinical research agreement with Duke University, termination notice period   90 days          
Expected milestone payments upon approval 8,000,000            
Another expected milestone payments upon approval $ 5,000,000            
Minimum percentage of royalty obligation 12.50%            
Maximum percentage of royalty obligation 25.00%            
Product sales levels royalty 5.00%            
Minimum percentage of range of royalties that can be buy down 12.50%            
Maximum percentage of range of royalties that can be buy down 17.00%            
Milestone payment due period 6 months