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Stockholders' Equity (Details 6) - Consultant Plan [Member] - shares
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Reserved but unissued shares under the Consultant Plan at January 1 65,608 64,037
Increases in the number of authorized shares under the Consultant Plan 31,522 8,571
Stock grants (5,000) (7,000)
Stock grant forfeitures 0 0
Reserved but unissued shares under the Consultant Plan at December 31 92,130 65,608