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Stock-based compensation
 9 Months Ended
Sep. 30, 2016
Disclosure Of Compensation Related Costs, Share-Based Payments [Abstract]  
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]
7.  Stock-based compensation
 
For the nine months ended September 30, 2016, the Company had no activity related to stock options. As of September 30, 2016, a summary of options outstanding under the Company’s 2014 options grant was as follows:
 
Range of
Exercise
Price
 
Weighted-
Average Remaining
Contractual Life (Years)
 
Number
Outstanding
 
Weighted-
Average
Exercise
Price
 
Number
Exercisable
 
Weighted-
Average
Exercise
Price
 
$
0.17
 
 
2.63
 
 
175,000
 
$
0.17
 
 
175,000
 
$
0.17
 
 
The Company agreed to compensate each director in the amount of $25,000 per year, payable quarterly, beginning on January 1, 2016. Such compensation may be paid to each director either in the form of cash, or the Company’s common stock or a combination thereof at the election of such director which may be changed during the year with respect to future payments. The Company compensated one of its directors by issuing common stock, one of its directors by issuing common stock and in cash, and the third director in cash for services rendered in 2016. The Company compensated two of its four directors by issuing common stock, and two directors in cash for services rendered in 2015. The number of shares issued to each director was determined based upon the equivalent cash compensation accrued divided by the closing price of the Company’s common stock on the date that the compensation is fully earned each quarter, which is the last day of such quarter. The Company recorded stock-based compensation expense of $9,375 and $28,125 for the three and nine months ended September 30, 2016 for two directors, which was recorded as common stock to be issued.
 
On January 11, 2016, the Company issued 41,667 shares of common stock to each of two directors as compensation for the three months ended December 31, 2015. These shares, totaling 83,334, were valued at a per share price of $0.15, or a total of $12,500.
 
On April 12, 2016, the Company issued 39,063 shares of common stock to one director, and 19,531 shares of common stock to a second director as compensation for the three months ended March 31, 2016. These shares, totaling 58,594, were valued at a per share price of $0.16, or a total of $9,375 (unaudited).
  
On July 11, 2016, the Company issued 39,063 shares of common stock to one director, and 19,531 shares of common stock to a second director as compensation for the three months ended June 30, 2016. These shares, totaling 58,594, were valued at a per share price of $0.16, or a total of $9,375 (unaudited).
 
On October 4, 2016, the Company issued 31,251 shares of common stock to one director, and 15,625 shares of common stock to a second director as compensation for the three months ended September 30, 2016. These shares, totaling 46,876, were valued at a per share price of $0.20, or a total of $9,375 (unaudited).