Accrued Expenses and Other Current Liabilities (Schedule of Product Warranty Accruals) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Movement in Standard Product Warranty Accrual [Roll Forward]
Balance at beginning of period	$ 599	$ 837	$ 642	$ 684
Provision for product warranty - expense	34	54	139	336
Warranty liability assumed in acquisition liability		0	80	0
Adjustments and utilization of warranty accrual	(57)	126	(205)	(255)
Balance at end of period	$ 656	$ 765	$ 656	$ 765