Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Revenue:
Total Revenue	$ 73,447	$ 65,764	$ 135,764	$ 128,077
Cost of sales:
Amortization of intangibles	1,246	725	2,047	1,465
Total cost of sales	34,806	35,435	66,659	67,965
Gross profit	38,641	30,329	69,105	60,112
Operating expenses:
Sales and marketing	14,556	11,534	26,617	23,191
Research and development	11,532	9,569	21,863	19,087
General and administrative	8,791	8,441	17,346	11,558
Restructuring charge (reversal)	38	0	38	(67)
Total operating expenses	34,917	29,544	65,864	53,769
Operating income	3,724	785	3,241	6,343
Other (expense) income, net:
Interest income	50	144	281	352
Interest expense	(1,734)	(2)	(2,166)	(94)
Other income (expense), net	89	257	(147)	305
Total other (expense) income, net	(1,595)	399	(2,032)	563
Income before income taxes	2,129	1,184	1,209	6,906
Income tax expense (benefit)	125	(158)	(1,003)	882
Net income	$ 2,004	$ 1,342	$ 2,212	$ 6,024
Basic net income per common share:
Net income, basic (USD per share)	$ 0.07	$ 0.05	$ 0.08	$ 0.22
Diluted net income per common share
Net income, diluted (USD per share)	$ 0.07	$ 0.05	$ 0.07	$ 0.21
Weighted average common shares:
Basic (shares)	28,881	27,866	28,673	27,687
Diluted (shares)	29,486	28,438	29,585	28,289
Product
Revenue:
Revenue	$ 65,641	$ 58,473	$ 119,888	$ 113,453
Cost of sales:
Cost of sales excluding amortization	29,687	31,225	58,178	59,894
Service
Revenue:
Revenue	7,806	7,291	15,876	14,624
Cost of sales:
Cost of sales excluding amortization	$ 3,873	$ 3,485	$ 6,434	$ 6,606