Stock-Based Compensation, Stock Option Activity (Details) - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Unamortized Stock Compensation Expense [Abstract]
Unamortized stock compensation expense		$ 1,753,155
Stock Options [Member]
Number of Shares [Roll Forward]
Options outstanding, beginning balance (in shares)		541,117
Assumed in connection with Merger (in shares)		347,697
Granted (in shares)		806,137
Exercised (in shares)		0
Forfeited (in shares)		(289,049)
Options outstanding, ending balance (in shares)		1,405,902
Vested and expected to vest (in shares)		1,405,902
Exercisable (in shares)		1,006,972
Weighted Average Exercise Price [Roll Forward]
Options outstanding, beginning balance (in dollars per share)		$ 7.20
Assumed in connection with merger (in dollars per share)		121.52
Granted (in dollars per share)		7.55
Exercised (in dollars per share)		0
Forfeited (in dollars per share)		97.80
Options outstanding, ending balance (in dollars per share)		17.05
Vested and expected to vest (in dollars per share)		17.05
Exercisable (in dollars per share)		$ 21.37
Weighted Average Remaining Contractual Life and Aggregate Intrinsic Value [Abstract]
Options outstanding, weighted average remaining contractual life		7 years 2 months 12 days
Vested and expected to vest, weighted average remaining contractual life		7 years 2 months 12 days
Exercisable, weighted average remaining contractual life		6 years 2 months 8 days
Options outstanding, aggregate intrinsic value		$ 0
Vested and expected to vest, aggregate intrinsic value		0
Exercisable, aggregate intrinsic value		$ 0
Unamortized Stock Compensation Expense [Abstract]
Period for recognition		3 years 7 months 10 days
Stock Options [Member] | July 6, 2018 [Member]
Number of Shares [Roll Forward]
Granted (in shares)	95,300		95,300