Stock Option Plans - Additional Information (Detail) (USD $)
|
12 Months Ended | 12 Months Ended | 12 Months Ended | 12 Months Ended | 12 Months Ended | ||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2013
|
Dec. 31, 2012
|
Dec. 31, 2011
|
Dec. 31, 2010
|
Dec. 31, 2013
Employees
|
Dec. 31, 2012
Employees
|
Dec. 31, 2011
Employees
|
Dec. 31, 2013
Non Employees
|
Dec. 31, 2012
Non Employees
|
Dec. 31, 2011
Non Employees
|
Dec. 31, 2013
Two Thousand Three Plan
|
Sep. 18, 2003
Two Thousand Three Plan
|
Dec. 31, 2013
Two Thousand Three Plan
Maximum
|
Dec. 31, 2010
Amended Two Thousand Three Plan
|
Dec. 31, 2008
Amended Two Thousand Three Plan
|
Dec. 31, 2007
Amended Two Thousand Three Plan
|
Dec. 31, 2013
Performance Based Stock Options
|
Dec. 31, 2012
Performance Based Stock Options
|
Dec. 31, 2011
Performance Based Stock Options
|
Dec. 31, 2010
Performance Based Stock Options
|
Dec. 31, 2013
2013 Stock Incentive Plan
|
Dec. 31, 2013
Employee Restricted Stock Plan
|
Dec. 31, 2013
Restricted Stock
|
|
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||||||||||||||||||||
Common stock reserved for future issuance | 450,000 | 1,160,000 | 810,000 | 670,000 | 2,000,000 | ||||||||||||||||||
Shares of common stock vested and exercisable | 406,353 | ||||||||||||||||||||||
Percentage of option price | 100.00% | ||||||||||||||||||||||
Stock option period | 10 years | 10 years | |||||||||||||||||||||
Common stock vesting period | 3 years | 3 years | |||||||||||||||||||||
Grant date weighted average fair value options | $ 0.39 | $ 2.24 | $ 2.49 | ||||||||||||||||||||
Total intrinsic value | $ 95,000 | ||||||||||||||||||||||
Number of options exercised | 108,146 | 0 | 0 | ||||||||||||||||||||
Intrinsic value of outstanding exercisable options | 98,000 | ||||||||||||||||||||||
Number of Shares Outstanding Under Option | 407,020 | 706,803 | 737,020 | 670,355 | 7,640 | 161,240 | 161,240 | 132,260 | |||||||||||||||
Total fair value of shares vested | 2,000 | 158,000 | 253,000 | ||||||||||||||||||||
Granted | 0 | 54,250 | 224,250 | 0 | 0 | 130,000 | 0 | ||||||||||||||||
Unrecognized compensation cost | 0 | ||||||||||||||||||||||
Weighted average term | 3 years | ||||||||||||||||||||||
Common stock reserved for future issuance | 1,257,500 | ||||||||||||||||||||||
Restricted shares forfeited under stock incentive plan | 26,000 | ||||||||||||||||||||||
Shares available for issuance under stock incentive plan | 680,953 | 381,170 | 353,953 | 423,618 | 768,500 | ||||||||||||||||||
Unrecognized compensation expense for restricted stock | 1,019,000 | ||||||||||||||||||||||
Weighted average grant date fair value | $ 1.94 | ||||||||||||||||||||||
Stock-based compensation expenses | $ 809,000 | $ 45,000 | $ 301,000 | $ 302,000 | $ 45,000 | $ 301,000 | $ 506,000 | $ 0 | $ 0 |