STOCK-BASED COMPENSATION (Details) (USD $)
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12 Months Ended | 0 Months Ended | 12 Months Ended | 12 Months Ended | 42 Months Ended | 12 Months Ended | ||||||||||||||||
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Dec. 31, 2013
|
Dec. 31, 2012
|
Dec. 31, 2011
|
Dec. 31, 2013
2000 Option Plan
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Dec. 31, 2013
2000 Option Plan
Minimum
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Dec. 31, 2013
2000 Option Plan
Maximum
|
Dec. 31, 2013
2000 Option Plan
Options
|
Dec. 31, 2013
2000 Option Plan
Restricted stock
|
Jul. 25, 2013
2010 Stock Plan
|
Dec. 31, 2013
2010 Stock Plan
|
Dec. 31, 2013
2010 Stock Plan
Minimum
|
Dec. 31, 2013
2010 Stock Plan
Maximum
|
Dec. 31, 2013
2010 Stock Plan
Options
|
Dec. 31, 2013
2010 Stock Plan
Restricted stock
|
Dec. 31, 2013
2010 Purchase Plan
|
Dec. 31, 2012
2010 Purchase Plan
|
Dec. 31, 2011
2010 Purchase Plan
|
Dec. 31, 2013
2010 Purchase Plan
|
Dec. 31, 2013
2010 Purchase Plan
April 30, 2013
|
Dec. 31, 2013
2010 Purchase Plan
October 31, 2013
|
Dec. 31, 2013
2010 Purchase Plan
Minimum
item
|
Dec. 31, 2013
2010 Purchase Plan
Maximum
|
|
Stock-based compensation | ||||||||||||||||||||||
Further grants or awards after termination of plan (in shares) | 0 | 0 | ||||||||||||||||||||
Expiration period from the date of grant | 10 years | 10 years | ||||||||||||||||||||
Vesting period | 3 years | 4 years | 3 years | 4 years | ||||||||||||||||||
Period by which all options to purchase common stock will accelerate upon an acquisition of the company | 1 year | 1 year | ||||||||||||||||||||
Period from the completion of acquisition, during which if an employee is terminated without cause or for good reason, all awards then outstanding held by that employee will immediately become exercisable | 1 year | |||||||||||||||||||||
Shares outstanding | 4,582,064 | 27,000 | 1,480,523 | 1,123,694 | ||||||||||||||||||
Increase in number of shares reserved for issuance | 2,800,000 | |||||||||||||||||||||
Shares available for future grant | 2,980,421 | 2,852,078 | 128,343 | 128,343 | ||||||||||||||||||
Number of hours per week of customary employment required to participate in the plan | 20 | |||||||||||||||||||||
Number of months of customary employment required to participate in the plan | 5 months | |||||||||||||||||||||
Percentage of employee's compensation to be deducted from the employee's pay | 1.00% | 15.00% | ||||||||||||||||||||
Option exercise price, expressed as a percentage of fair market value | 85.00% | |||||||||||||||||||||
Maximum value of shares that an employee is permitted to purchase | $ 25,000 | |||||||||||||||||||||
Number of Shares | 59,932 | 63,611 | 51,857 | 59,932 | 63,611 | 51,857 | 171,657 | 33,338 | 26,594 | |||||||||||||
Weighted Average Price per Share (in dollars per share) | $ 7.56 | $ 7.55 | ||||||||||||||||||||
Proceeds from stock option exercise | $ 1,300,000 | $ 2,400,000 | $ 700,000 | $ 500,000 | $ 400,000 | $ 300,000 |