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Stockholders' Equity - Summary of Stock Option Activity Under Stock Option and Incentive Plans (Details) - USD ($)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Equity [Abstract]    
Outstanding, Beginning balance 782,655 482,667
Granted 405,000
Lapsed/terminated (204,738) (105,012)
Outstanding, Ending balance 577,917 782,655
Exercisable 408,750 490,988
Expected to vest , Ending balance 169,167 291,667
Outstanding Beginning balance, Weighted Average Exercise Price $ 6.66 $ 10.72
Granted, Weighted Average Exercise Price 1.38
Lapsed/terminated, Weighted Average Exercise Price 4.96
Outstanding, Ending balance, Weighted Average Exercise Price 5.01 6.66
Exercisable Weighted Average Exercise Price 6.50 8.30
Expected to Vest, Ending balance, Weighted Average Exercise Price $ 1.43 $ 1.41
Outstanding, Weighted Average Life Remaining 3 years 2 months 12 days 3 years 2 months 12 days
Exercisable, Weighted Average Life Remaining 3 years 6 months 2 years 9 months 18 days
Expected to vest, Weighted Average Life Remaining 3 years 4 months 24 days 4 years 6 months
Aggregate intrinsic value of outstanding option, Ending balance
Aggregate intrinsic value of exercisable options, Ending balance
Aggregate intrinsic value of options expected to vest, Ending balance