Advertising and promotion (Details) - USD ($) |
3 Months Ended | |
|---|---|---|
Mar. 31, 2017 |
Mar. 31, 2016 |
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| Advertising and promotion details | ||
| Advertising and promotion costs | $ 1,847 | $ 2,541 |
| X | ||||||||||
- Definition Goodwill was recorded on the acquisition of CAST No definition available.
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| X | ||||||||||
- Definition The total expense recognized in the period for promotion, public relations, and brand or product advertising. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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