Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
NET REVENUES	$ 111,231	$ 85,264	$ 199,572	$ 178,181
COST OF SALES	42,754	27,492	81,936	58,861
GROSS PROFIT	68,477	57,772	117,636	119,320
OPERATING EXPENSES
Research and development	5,691	6,065	11,885	11,716
Selling and marketing	7,514	6,540	15,255	13,561
General and administrative	18,555	12,925	33,215	24,863
Acquisition-related costs	68	0	68	0
Selected legal costs	508	1,030	789	2,257
Change in fair value of acquisition consideration	0	(2,989)	0	(1,942)
Total operating expenses	32,336	23,571	61,212	50,455
OPERATING INCOME	36,141	34,201	56,424	68,865
OTHER INCOME (EXPENSE)
Interest income	2	6	3	15
Interest expense	(341)	(472)	(713)	(1,006)
RADx grant income	0	200	0	1,000
Other, net	733	(883)	572	(1,574)
Total other income (expense), net	394	(1,149)	(138)	(1,565)
EARNINGS BEFORE INCOME TAXES	36,535	33,052	56,286	67,300
INCOME TAX PROVISION	7,783	6,750	12,194	14,219
NET EARNINGS	$ 28,752	$ 26,302	$ 44,092	$ 53,081
Earnings Per Share Data:
BASIC EARNINGS PER COMMON SHARE	$ 0.66	$ 0.61	$ 1.01	$ 1.23
DILUTED EARNINGS PER COMMON SHARE	$ 0.65	$ 0.60	$ 1.00	$ 1.21
WEIGHTED AVERAGE NUMBER OF COMMON SHARES OUTSTANDING - BASIC	43,549	43,244	43,495	43,171
EFFECT OF DILUTIVE STOCK OPTIONS AND RESTRICTED SHARE UNITS	713	878	617	789
WEIGHTED AVERAGE NUMBER OF COMMON SHARES OUTSTANDING - DILUTED	44,262	44,122	44,112	43,960
ANTI-DILUTIVE SECURITIES:
Common share options and restricted share units	186	166	480	169