Stock-Based Compensation (Details 1) - USD ($) $ in Thousands		3 Months Ended
		Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation		$ 1,615	$ 3,198
Restricted stock and Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation		1,615	783
Modification of awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	[1]		2,105
Payroll taxes on vesting [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation			$ 310

[1] Reflects incremental compensation cost recognized in December 2017 in connection with the modification of certain awards held by two executive officers of the Company.