Geographical Information (Schedule of Revenue by Geographic Region) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Segment Reporting Information [Line Items]
Revenue	$ 21,532	$ 19,057	$ 44,022	$ 37,473
United States [Member]
Segment Reporting Information [Line Items]
Revenue	15,369	13,063	29,182	26,413
Asia [Member]
Segment Reporting Information [Line Items]
Revenue	4,638	3,901	10,977	6,598
Europe [Member]
Segment Reporting Information [Line Items]
Revenue	1,371	1,950	3,534	4,027
Other [Member]
Segment Reporting Information [Line Items]
Revenue	$ 154	$ 143	$ 329	$ 435