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OCAST Grant - Additional Information (Detail) (USD $)
1 Months Ended 3 Months Ended 6 Months Ended 150 Months Ended
Nov. 19, 2008
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Dec. 31, 2009
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]              
Amount earned from grant $ 800,000,000 $ 0 $ 11,020 $ 0 $ 63,668 $ 281,492  
Grant receivable             299,984
Direct costs incurred and for the use of the OU lab facilities       0 9,780    
2009 | Maximum
             
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]              
Amount owed in direct costs             $ 149,940