Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended			6 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	[1]	Mar. 31, 2019	Mar. 31, 2018	[1]
Revenue:
Total Revenue	$ 65,764	$ 54,548		$ 128,077	$ 99,503
Cost of sales:
Amortization of intangibles	725	770		1,465	1,377
Total cost of sales	35,435	27,714		67,965	50,710
Gross profit	30,329	26,834		60,112	48,793
Operating expenses:
Sales and marketing	11,534	11,175		23,191	20,935
Research and development	9,569	8,617		19,087	16,368
General and administrative	8,441	6,224		11,558	12,671
Restructuring reversal	0	0		(67)	0
Total operating expenses	29,544	26,016		53,769	49,974
Operating income (loss)	785	818		6,343	(1,181)
Other income (expense), net:
Interest income	144	38		352	246
Interest expense	(2)	(4)		(94)	(7)
Other income (expense), net	257	(527)		305	(572)
Total other income (expense), net	399	(493)		563	(333)
Income (loss) before income taxes	1,184	325		6,906	(1,514)
Income tax (benefit) expense	(158)	451		882	3,099
Net income (loss)	$ 1,342	$ (126)		$ 6,024	$ (4,613)
Basic net income (loss) per common share:
Net income (loss), basic (USD per share)	$ 0.05	$ 0.00		$ 0.22	$ (0.17)
Diluted net income (loss) per common share
Net income (loss), diluted (USD per share)	$ 0.05	$ 0.00		$ 0.21	$ (0.17)
Weighted average common shares:
Basic (shares)	27,866	27,084		27,687	26,914
Diluted (shares)	28,438	27,084		28,289	26,914
Product
Revenue:
Revenue	$ 52,097	$ 47,588		$ 102,909	$ 86,042
Cost of sales:
Cost of sales excluding amortization	28,496	23,080		54,309	42,290
Services and Solutions
Revenue:
Revenue	13,667	6,960		25,168	13,461
Cost of sales:
Cost of sales excluding amortization	$ 6,214	$ 3,864		$ 12,191	$ 7,043

[1] Prior period information has been restated for the adoption of ASU No. 2014-09, “Revenue from Contracts with Customers (Topic 606),” which we adopted on October 1, 2018.