Legal Proceedings and Contingencies - Additional Information (Detail) (USD $)
1 Months Ended 9 Months Ended 1 Months Ended 9 Months Ended
Apr. 30, 2012
Patents
May 31, 2014
Defendants
May 31, 2014
Penford Products [Member]
Mar. 31, 2014
Carolina Starches, LLC [Member]
May 31, 2014
Carolina Starches, LLC [Member]
Loss Contingencies [Line Items]          
Number of patents under allegation of patent infringement 2        
Number of defendants   2      
Name of defendants   Penford Products and Carolina Starches, LLC      
Name of plaintiff   Pirinate Consulting Group, LLC      
Amount of recovery sought in complaint     $ 778,000   $ 216,000
Payment for full and final settlement of litigation       $ 10,000