| Note 12. WARRANTS | 
 The Company has the following shares of common
stock reserved for exercise of the warrants outstanding as of March 31, 2016: 
  
    |   | 
      | 
    March 31, 2016 | 
      | 
 
    |   | 
      | 
    Shares  | 
      | 
      | 
    
         Weighted 
        Average 
        Exercise 
        Price 
 | 
      | 
 
    | Warrants outstanding  beginning of year | 
      | 
      | 
    32,426,008 | 
      | 
      | 
    $ | 
    0.18 | 
      | 
 
    | Warrants exercised | 
      | 
      | 
    (9,206,330 | 
    ) | 
      | 
      | 
    0.13 | 
      | 
 
    | Warrants granted | 
      | 
      | 
    6,842,104 | 
      | 
      | 
      | 
    0.13 | 
      | 
 
    | Warrants expired  | 
      | 
      | 
    (150,000 | 
    ) | 
      | 
      | 
    (0.46 | 
    ) | 
 
    |   | 
      | 
      | 
      | 
      | 
      | 
      | 
      | 
      | 
 
    | Warrants outstanding  end of period | 
      | 
      | 
    29,911,782 | 
      | 
      | 
    $ | 
    0.15 | 
      | 
 
 
  
The following table summarizes information
about fixed-price warrants outstanding: 
  
    | Range of | 
      | 
    
         Number 
        Outstanding at 
 | 
      | 
      | 
    
         Average 
        Remaining 
 | 
      | 
    Weighted | 
      | 
 
    | Exercise | 
      | 
    March 31, | 
      | 
      | 
    Contractual | 
      | 
    Average | 
      | 
 
    | Prices | 
      | 
    2016 | 
      | 
      | 
    Life | 
      | 
    Exercise Price | 
      | 
 
    | $0.85 | 
      | 
      | 
    40,000 | 
      | 
      | 
    1 Months | 
      | 
    $ | 
    0.85 | 
      | 
 
    | $0.40 | 
      | 
      | 
    333,333 | 
      | 
      | 
    5 Months | 
      | 
    $ | 
    0.40 | 
      | 
 
    | $0.33 | 
      | 
      | 
    439,637 | 
      | 
      | 
    10 Months | 
      | 
    $ | 
    0.33 | 
      | 
 
    | $0.16 | 
      | 
      | 
    750,000 | 
      | 
      | 
    12 Months  | 
      | 
    $ | 
    0.16 | 
      | 
 
    | $0.14 | 
      | 
      | 
    1,578,947 | 
      | 
      | 
    27 Months | 
      | 
    $ | 
    0.14 | 
      | 
 
    | $0.21 | 
      | 
      | 
    14,946,119 | 
      | 
      | 
    27 Months | 
      | 
    $ | 
    0.21 | 
      | 
 
    | $0.30 | 
      | 
      | 
    1,846,300 | 
      | 
      | 
    28 Months | 
      | 
    $ | 
    0.14 | 
      | 
 
    | $0.06 | 
      | 
      | 
    7,067,002 | 
      | 
      | 
    31 Months | 
      | 
    $ | 
    0.06 | 
      | 
 
    | $0.16 | 
      | 
      | 
    1,118,068 | 
      | 
      | 
    35 Months | 
      | 
    $ | 
    0.16 | 
      | 
 
    | $0.13 | 
      | 
      | 
    863,392 | 
      | 
      | 
    37 Months | 
      | 
    $ | 
    0.13 | 
      | 
 
    | $0.12 | 
      | 
      | 
    928,984 | 
      | 
      | 
    38 Months | 
      | 
    $ | 
    0.12 | 
      | 
 
    |   | 
      | 
      | 
    29,911,782 | 
      | 
      | 
      | 
      | 
      | 
      | 
      | 
 
 
 |