Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Operating activities:
Net income	$ 2,212	$ 6,024
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Depreciation of property, equipment and improvements	2,289	2,217
Amortization of intangible assets	6,564	4,609
Stock-based compensation	3,441	2,707
Deferred income tax provision	756	1,338
Gain on sale of property and equipment	0	(4,395)
Change in fair value of contingent consideration	(128)	810
Provision for bad debt and product returns	108	568
Provision for inventory obsolescence	516	900
Restructuring charge (reversal)	38	(67)
Other	50	(116)
Changes in operating assets and liabilities (net of acquisitions)	(28,529)	(8,393)
Net cash (used in) provided by operating activities	(12,683)	6,202
Investing activities:
Proceeds from maturities and sales of marketable securities	0	2,252
Acquisition of businesses, net of cash acquired	(136,098)	0
Proceeds from sale of property and equipment	0	10,047
Purchase of property, equipment, improvements and certain other intangible assets	(434)	(7,346)
Net cash (used in) provided by investing activities	(136,532)	4,953
Financing activities:
Proceeds from long-term debt	110,000	0
Payments on long-term debt	(625)	0
Payments for contingent consideration	0	(2,348)
Proceeds from stock option plan transactions	4,724	3,751
Proceeds from employee stock purchase plan transactions	516	549
Purchases of common stock	(1,684)	(1,044)
Net cash provided by financing activities	112,931	908
Effect of exchange rate changes on cash and cash equivalents	1,578	(484)
Net (decrease) increase in cash and cash equivalents	(34,706)	11,579
Cash and cash equivalents, beginning of period	92,792	58,014
Cash and cash equivalents, end of period	58,086	69,593
Supplemental schedule of non-cash investing and financing activities
Transfer of inventory to property, equipment and improvements	(743)	(654)
Contingent consideration recognized related to acquisition of business	(5,100)	0
Accrual for purchase of property, equipment, improvements and certain other intangible assets	$ 0	$ (20)