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Organization and Summary of Significant Accounting Policies - Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share, in Money Potential Common Shares (Detail) (USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Average market price during the period $ 2.96 $ 3.20 $ 2.98
Employee Stock Incentive Plan [Member]
     
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Potential common shares excluded from EPS 146,162 275,101 129,793
Warrants [Member]
     
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Potential common shares excluded from EPS 92,363 1,129,973 959,521