Equity (Schedule of Stock-based Compensation Expense - by Award Type) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 779	$ 677	$ 2,625	$ 1,823
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	4	6	13	20
Restricted stock units and awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	403	380	1,331	1,162
Performance stock units and awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	255	188	910	357
Employee stock purchase plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	52	50	145	132
Outside director equity awards and fees in common stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 65	$ 53	$ 226	$ 152