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1. Nature of Activities and Summary of Significant Accounting Policies (Details 1) - shares
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Total number of potentially dilutive shares excluded from the basic and diluted net loss per share calculation 7,312 4,197
Series B preferred (post split basis)    
Total number of potentially dilutive shares excluded from the basic and diluted net loss per share calculation 132 132
Common stock options and warrants    
Total number of potentially dilutive shares excluded from the basic and diluted net loss per share calculation 3,640 2,857
Debt with conversion feature at $30 per share of common stock    
Total number of potentially dilutive shares excluded from the basic and diluted net loss per share calculation 1,242 1,208
SARs conversion of stock issued at $0.91 per share to cover $2.1 million    
Total number of potentially dilutive shares excluded from the basic and diluted net loss per share calculation 2,298 0