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Stockholders’ Equity (Tables)
12 Months Ended
Dec. 31, 2015
Stockholders Equity Tables  
Common stock warrant activity
Balance at December 31, 2013     17,226,146  
    Granted     21,802,793  
    Expired / cancelled     (1,057,309 )
    Exercised     (2,750,000 ) 
Balance at December 31, 2014     35,221,630  
     Granted     12,595,237  
     Expired / cancelled     (5,335,821 )
     Exercised     (806,250 )
Balance at December 31, 2015     41,674,796  
Summary of Plan Options
   

Number of

Shares

   

Weighted

Average

Exercise Price

   

Aggregate

Intrinsic

Value

(in thousands)

 
Outstanding December 31, 2013     17,572,500     $ 0.22     $ 478  
Issued     11,517,250       0.22          
Canceled/expired     (161,000 )     0.19        
Exercised     (10,250 )     0.23         -  
Outstanding December 31, 2014     28,918,500       0.21       786  
Issued     1,124,250       0.31          
Canceled / expired     (6,151,475 )      0.22          
Exercised     (369,675 )      0.21         -  
Outstanding December 31, 2015     23,521,600     $ 0.22     $ 2,044  
Exercisable December 31, 2015     18,469,600     $ 0.22     $ 1,463  
Exercise price range, number of shares, weighted-average exercise price and remaining contractual lives
Weighted           Weighted     Weighted  
Average           Average     Average  
Exercise Price     Options     Exercise Price     Remaining Life  
Outstanding:                    
$ 0.16 - $0.21       7,755,650     $ 0.19       7.81  
$ 0.21 - $0.23       11,849,250     $ 0.22       6.29  
$ 0.23 - $0.35       3,701,950     $ 0.26       2.98  
$ 0.35 - $0.40       214,750     $ 0.38       2.44  
Exercisable:                          
$ 0.16 - $0.21       2,703,650     $ 0.18       6.45  
$ 0.21 - $0.23       11,849,250     $ 0.22       6.29  
$ 0.23 - $0.33       3,701,950     $ 0.26       2.98  
$ 0.23 - $0.33       214,750     $ 0.38       2.44  
Stock based compensation expense
    Years ended December 31,  
    2015     2014  
Cost of revenues   $ 17     $ 14  
Distributor compensation     158       195  
Sales and marketing     28       21  
General and administrative     506       304  
    $ 709     $ 534  
Black Scholes compensation cost
    Years ended December 31,
    2015   2014
Dividend yield     -   -
Stock price volatility     66% - 77 % 75% - 98%
Risk-free interest rate     0.56% - 1.06 % 0.33% - 2.12%
Expected life of options   1.5 - 5.0 years 3.0 - 7.0 years