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Schedule of Assumptions Used (Detail)
6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Expected life (in years) 6 years 0 years
Risk-free interest rate 1.61% 0.00%
Expected volatility 63.15% 0.00%
Dividend yield 0.00% 0.00%