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Stock Options (Details)
Mar. 31, 2017
USD ($)
$ / shares
shares
Dec. 31, 2016
USD ($)
shares
Apr. 28, 2016
shares
Dec. 31, 2015
USD ($)
$ / shares
shares
Stock Options Details        
Common stock reserved for issuance under the 2013 Plan     319,269  
Shares of our common stock to a total of shares     375,000  
Shares of common stock were reserved for issuance under the 2011 Plan   750    
Shares of common stock were reserved for issuance under the 2013 Plan   199,669    
Company granted a total of options 123,750 73,688   28,438
Total compensation cost of the options | $ $ 162,350 $ 168,411   $ 306,796
Total compensation cost of the options will be recognized in years 1.50     3.81
Weighted average exercise price of the options | $ / shares $ 4.00     $ 11.88
Weighted average fair value of the options on the dates of grant | $ / shares $ 2.85     $ 11.82
Options vested   2,938    
Options to purchase shares outstanding under the plans   101,188    
Vested options exercisable into shares of common stock   2,938    
Shares reserved for future grant   200,419    
Total share-based compensation expense | $   $ 341,558   $ 518,438
Unrecognized share-based compensation expense | $   $ 452,551   $ 619,300
Weighted average remaining recognition period   9.29   9.65