v2.4.0.6
Income Taxes - Additional Information (Detail) (USD $)
 3 Months Ended 6 Months Ended 12 Months Ended 167 Months Ended 179 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2011
Income Tax Contingency [Line Items]              
Net loss $ (41,048) $ (915,492) $ (945,349) $ (1,475,553) $ (2,734,079) $ (7,750,000) $ (10,500,000)
Deferred income tax benefit             $ 0