Advertising and promotion (Details) - USD ($)  | 
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2016  | 
Sep. 30, 2015  | 
Sep. 30, 2016  | 
Sep. 30, 2015  | 
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| Advertising and promotion details | ||||
| Advertising and promotion costs | $ 5,621 | $ 6,495 | $ 13,429 | $ 51,237 | 
| X | ||||||||||
- Definition Goodwill was recorded on the acquisition of CAST No definition available. 
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| X | ||||||||||
- Definition Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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