Income Taxes (Components of Provision (Benefit)) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Current:
Domestic Federal									$ 530	$ (320)	$ 370
Foreign									500	500	530
Foreign withholding taxes									280	1,240	0
Domestic state									110	0	80
Total current									1,420	1,420	980
Deferred:
Domestic Federal									1,680	720	(490)
Foreign									0	(210)	750
Domestic state									0	(20)	0
Total deferred									1,680	490	260
Total provision	$ 1,060	$ 70	$ 1,670	$ 300	$ 1,270	$ 290	$ 170	$ 180	$ 3,100	$ 1,910	$ 1,240