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Stockholders' Equity (Tables)
12 Months Ended
Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Summary of Activity of Common Stock Warrants Retroactively Adjusted for Reverse Stock Split
   

Common Stock

Warrants

 
Outstanding, January 1, 2013     178,159  
Granted to lenders     52,695  
Exercised     (88,462 )
Expired      
Outstanding, December 31, 2014     142,392  
Outstanding, December 31, 2015     142,392  
Schedule of Components of Stock-based Compensation Included in Net Loss
    For the years ended  
    December 31,  
    2015     2014  
Employee stock options   $ 924     $ 571  
Non-employee stock options     571       495  
Restricted stock awards     79        
    $ 1,574     $ 1,066  
Schedule of Stock Option Valuation Assumptions
    December 31,  
    2015     2014  
Dividend yield     0.0 %     0.0 %
Expected volatility     72.4-107.6 %     107 – 110 %
Risk-free interest rate     1.69-2.27 %     2.06 – 2.23 %
Expected lives (years)     6.25 – 10       5.9 – 6.5  
Schedule of Stock Option Activity
    Shares    

Weighted

Average

Exercise

Price

 
Outstanding, December 31, 2014     1,018,590     $ 5.04  
Granted     393,375     $ 5.32  
Exercised     (10,272 )   $ 1.97  
Forfeited     (187,007 )   $ 6.53  
Outstanding, December 31, 2015     1,214,686     $ 4.93  
Schedule of Options Outstanding, Vested and Exercisable
                               
Options Outstanding     Options Vested and Exercisable

Balance

as of

12/31/2015

   

Weighted

Average

Remaining

Contractual

Life

(Years)

   

Weighted

Average

Exercise
Price

   

Balance

as of
12/31/2015

   

Weighted

Average

Remaining

Contractual

Life

(Years)

   

Weighted
Average
Exercise

Price

1,214,686     7.40     $4.93     807,975     6.57     $4.44