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Fair Value Measurements - Estimated Fair Value of Warrant Liability (Details) - USD ($)
1 Months Ended 3 Months Ended 12 Months Ended
Dec. 31, 2016
Nov. 29, 2016
Nov. 08, 2016
Nov. 30, 2016
Mar. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Change in the estimated fair value of the warrant liability              
Beginning value of warrant liability         $ 799,201 $ 0  
Change in Fair Value of Level 3 Liability         453,419 43,200 $ 501,617
Ending Fair value of warrant liability $ 799,201       $ 1,252,620 $ 799,201 0
Fair Value Assumptions and Methodology for Assets and Liabilities              
Stock price $ 0.716 $ 0.69 $ 0.91 $ 0.69 $ 1.00 $ 0.716  
Exercise price $ 0.75 $ 0.75 $ 0.01 $ 0.75 $ 0.75 $ 0.75  
Term 5 years 4 months 28 days 5 years 6 months 5 years 8 months 19 days 5 years 6 months 5 years 1 month 28 days 5 years 4 months 28 days  
Volatility (as a percent) 73.62% 71.92% 70.35% 71.92% 78.33% 73.62%  
Dividend yield (as a percent) 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%  
Risk-free interest rate (as a percent) 2.00% 1.87% 1.45% 1.87% 1.95% 2.00%  
Recurring              
Change in the estimated fair value of the warrant liability              
Beginning value of warrant liability         $ 799,201    
Ending Fair value of warrant liability $ 799,201       1,252,620 $ 799,201  
Level 3 | Recurring              
Change in the estimated fair value of the warrant liability              
Beginning value of warrant liability         799,201   601,889
Change in Fair Value of Level 3 Liability         453,419 43,200 $ 501,617
Ending Fair value of warrant liability $ 799,201       $ 1,252,620 $ 799,201