Geographical Information (Schedule of Revenue by Geographic Region) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Segment Reporting Information [Line Items]
Revenue	$ 30,952	$ 22,376	$ 93,719	$ 66,398
United States [Member]
Segment Reporting Information [Line Items]
Revenue	23,391	17,469	74,075	46,651
Asia [Member]
Segment Reporting Information [Line Items]
Revenue	5,699	3,100	14,190	14,077
Europe [Member]
Segment Reporting Information [Line Items]
Revenue	1,653	1,680	4,978	5,214
Other [Member]
Segment Reporting Information [Line Items]
Revenue	$ 209	$ 127	$ 476	$ 456