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Galectin Science LLC - Additional Information (Detail) - Galectin Sciences, LLC - USD ($)
1 Months Ended 3 Months Ended 12 Months Ended
Jan. 31, 2014
Mar. 31, 2016
Dec. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Investments in and Advances to Affiliates [Line Items]          
Equity method investment in Galectin Sciences LLC $ 400,000        
Subsequent capital contribution   $ 227,000 $ 73,000 $ 687,000  
Equity Method Investment, Ownership Percentage 50.00% 77.90%   74.70%  
Ownership Percentage         54.20%
SBH Sciences, Inc | In Process Research and Development          
Investments in and Advances to Affiliates [Line Items]          
Estimated fair value of the IPR&D Contributed by SBH $ 400,000