Net Income (Loss) Per Share Attributable to Common Stockholders (Details) - Potentially dilutive securities excluded from the computation of diluted weighted average shares - shares	3 Months Ended
	Mar. 31, 2018	Mar. 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	538,645	2,563,766
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	529,332	272,287
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	5,700
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	3,613	7,563
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		1,501,566
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		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		687,362