Income Taxes (Deferred Tax Assets) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Sep. 30, 2018	[1]	Sep. 30, 2017
Income Tax Disclosure [Abstract]
Non-current deferred tax asset	$ 7,330	$ 6,600		$ 9,278
Non-current deferred tax liability	(261)	(334)
Net deferred tax asset	7,069	6,266
Depreciation and amortization	(480)	(856)
Inventories	536	740
Compensation costs	3,675	3,388
Other accruals	3,870	1,422
Tax credit carryforwards	4,911	7,063
Valuation allowance	(3,810)	(3,291)
Identifiable intangible assets	(1,633)	(2,298)
Other	0	98
Net deferred tax asset	$ 7,069	$ 6,266

[1] Prior period information has been restated for the adoption of ASU No. 2014-09, “Revenue from Contracts with Customers (Topic 606)”, which we adopted on October 1, 2018.