Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Operating activities:
Net income	$ 688	$ 1,230
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of property, equipment and improvements	897	848
Amortization of identifiable intangible assets	952	1,071
Stock-based compensation	1,023	955
Excess tax benefits from stock-based compensation	(20)	(28)
Deferred income tax benefit	(506)	(542)
Bad debt/product return provision	22	221
Inventory obsolescence	229	250
Restructuring charges, net	81	0
Other	102	38
Changes in operating assets and liabilities (net of acquisition)	(3,805)	(1,755)
Net cash (used in) provided by operating activities	(337)	2,288
Investing activities:
Purchase of marketable securities	0	(9,873)
Proceeds from maturities of marketable securities	7,109	17,473
Acquisition of business, net of cash acquired	0	(12,919)
Purchase of property, equipment, improvements and certain other intangible assets	(975)	(1,427)
Net cash provided by (used in) investing activities	6,134	(6,746)
Financing activities:
Excess tax benefits from stock-based compensation	20	28
Proceeds from stock option plan transactions	2,813	169
Proceeds from employee stock purchase plan transactions	296	248
Purchases of common stock	0	(4,226)
Net cash provided by (used in) financing activities	3,129	(3,781)
Effect of exchange rate changes on cash and cash equivalents	224	3
Net increase (decrease) in cash and cash equivalents	9,150	(8,236)
Cash and cash equivalents, beginning of period	41,320	60,246
Cash and cash equivalents, end of period	50,470	52,010
Supplemental schedule of non-cash investing activities:
Issuance of common stock for business acquisition	$ 0	$ 6,804