Net Loss Per Share Attributable to Common Stockholders (Details) - Potentially dilutive securities excluded from the computation of diluted weighted average shares - shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities excluded from denominator of the diluted earnings per share computation	1,261,124	2,719,255
Employee Stock Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities excluded from denominator of the diluted earnings per share computation	839,396	295,243
Warrant [Member] | Convertible Preferred Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities excluded from denominator of the diluted earnings per share computation	891	7,563
Warrant [Member] | Common Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities excluded from denominator of the diluted earnings per share computation	9,658
Cumulative Convertible Preferred Stock Dividends [Member] | Series B And C Preferred Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities excluded from denominator of the diluted earnings per share computation	213,760	1,567,172
Convertible Preferred Stock Outstanding [Member] | Series A Preferred Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities excluded from denominator of the diluted earnings per share computation	12,260	94,988
Convertible Promissory Notes Related Party [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities excluded from denominator of the diluted earnings per share computation	185,159	754,289