Common and Preferred Stock Reserved for Future Issuances: (Tables) |
6 Months Ended | 12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Jun. 30, 2016 |
Dec. 31, 2015 |
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| Common And Preferred Stock Reserved For Future Issuances [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Guarantor Obligations [Table Text Block] | Common stock reserved for future issuances consisted of the following at June 30, 2016:
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Common stock reserved for future issuances consisted of the following at December 31, 2015:
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