Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
CASH FLOWS FROM OPERATING ACTIVITIES
Net earnings	$ 17,726	$ 18,723
Non-cash items included in net earnings:
Depreciation of property, plant and equipment	1,756	1,666
Amortization of intangible assets	1,042	1,165
Amortization of deferred illumigene instrument costs	864	746
Stock-based compensation	2,157	1,573
Deferred income taxes	(31)	(278)
Loss on disposition and write-down of fixed assets and other assets		10
Change in current assets	(6,656)	477
Change in current liabilities	(3,143)	(1,116)
Other, net	(159)	(586)
Net cash provided by operating activities	13,556	22,380
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of property, plant and equipment	(2,573)	(1,408)
Purchases of intangible assets	(1,677)	(20)
Net cash used for investing activities	(4,250)	(1,428)
CASH FLOWS FROM FINANCING ACTIVITIES
Dividends paid	(16,169)	(15,652)
Proceeds and tax benefits from exercises of stock options	540	2,055
Net cash used for financing activities	(15,629)	(13,597)
Effect of Exchange Rate Changes on Cash and Equivalents	254	(354)
Net (Decrease) Increase in Cash and Equivalents	(6,069)	7,001
Cash and Equivalents at Beginning of Period	44,282	31,593
Cash and Equivalents at End of Period	$ 38,213	$ 38,594