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Stockholders' Equity - Summary of Warrant Activity (Details) - $ / shares
 12 Months Ended
Aug. 03, 2018
Dec. 31, 2018
Number of Shares, Exercisable at end of year   3,949,018
Common Stock Financing Warrant [Member]    
Number of Shares, outstanding, at beginning of year   1,289,172
Number of Shares, Issued   2,861,558
Number of Shares, Exercised   (842,117)
Number of Shares, Issued as result of the reset provision on August 3, 2018 640,405  
Number of Shares, outstanding at end of year   3,949,018
Number of Shares, Exercisable at end of year   3,949,018
Weighted Average Exercise Price, outstanding, at beginning of year   $ 0.29
Weighted Average Exercise Price, Issued   1.17
Weighted Average Exercise Price, Exercised   0.20
Weighted Average Exercise Prices, Issued as result of the reset provision on August 3, 2018 $ 0.50  
Weighted Average Exercise Price, outstanding, at end of year   0.64
Weighted Average Exercise Price, Exercisable at end of year   $ 0.64
Weighted Average Remaining Contractual Life, Outstanding at end of year   4 years 9 months 18 days
Weighted Average Remaining Contractual Life, Exercisable at end of year   4 years 9 months 18 days