Net Loss per Share (Details) - shares	3 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Number of antidilutive securities excluded from computation of earnings per share	13,289,644	14,312,324
Earnout Shares [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Number of antidilutive securities excluded from computation of earnings per share	1,323,558	2,500,000
Stock Warrants [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Number of antidilutive securities excluded from computation of earnings per share	9,539,565	9,539,565
Restricted Stock Units (RSUs) [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Number of antidilutive securities excluded from computation of earnings per share	1,802,405	1,648,643
Unvested Restricted Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Number of antidilutive securities excluded from computation of earnings per share	624,116	624,116