Income Taxes (Reconciliation Actual Income Taxes to Expected Federal Corporate Taxes) (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
Income Tax Disclosure [Abstract]
Expected U.S. federal corporate income tax rate, percent									34.00%
Tax benefit at the U.S. rate									$ (1,890)	$ (1,630)	$ (4,440)
Effect of permanent book-tax differences									1,120	(1,570)	30
State tax provision									110	(40)	80
Valuation allowance for net deferred tax assets									2,690	2,490	3,900
Uncertain tax items									350	330	370
Foreign tax rate differential									1,050	1,890	1,000
Other items									(330)	440	300
Total provision	$ 1,060	$ 70	$ 1,670	$ 300	$ 1,270	$ 290	$ 170	$ 180	$ 3,100	$ 1,910	$ 1,240