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Stock Options (Detail) - Stock Option Activity, Current Period - $ / shares
 6 Months Ended 12 Months Ended
Jun. 30, 2015
Dec. 31, 2014
Shares    
Balance at December 31, 2014 5,586,000  
Granted    
Expired/forfeited 835,000  
Balance at March 31, 2015 4,751,000 5,586,000
Options    
Shares    
Balance at December 31, 2014 2,750,000  
Granted 0  
Expired/forfeited 0  
Balance at March 31, 2015 2,750,000 2,750,000
Weighted Average Exercise Price    
Balance at December 31, 2014 $ 0.78  
Granted 0  
Expired/forfeited 0  
Balance at March 31, 2015 $ 0.78 $ 0.78
Weighted Average Remaining Contractual Life (Years)    
Options outstanding 9 years 9 years