Annual report pursuant to Section 13 and 15(d)

Stock Option Plans (Assumptions Used To Compute The Fair Value Of Stock Options) (Detail)

v3.3.1.900
Stock Option Plans (Assumptions Used To Compute The Fair Value Of Stock Options) (Detail) - USD ($)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Assumptions for Pricing Model:    
Expected annual dividends $ 0 $ 0
Value of options granted:    
Number of options granted 374,000 548,000
Weighted average fair value/share $ 4.50 $ 2.63
Fair value of options issued $ 1,684,179 $ 1,241,994
Minimum [Member]    
Assumptions for Pricing Model:    
Expected term in years 6 years 5 years 7 months 6 days
Volatility 111.40% 118.60%
Risk-free interest rate 1.74% 1.70%
Maximum [Member]    
Assumptions for Pricing Model:    
Expected term in years 7 years 10 months 24 days 10 years
Volatility 113.50% 119.70%
Risk-free interest rate 2.02% 2.42%