Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	[1]	Sep. 30, 2017	[1]
Revenue:
Total revenues	$ 254,203	$ 226,893		$ 181,340
Cost of sales:
Amortization	2,963	2,871		1,444
Total cost of sales	135,168	117,839		94,107
Gross profit	119,035	109,054		87,233
Operating expenses:
Sales and marketing	45,801	44,517		33,955
Research and development	37,564	33,178		28,566
General and administrative	25,685	28,276		13,331
Restructuring charge	(87)	301		2,515
Total operating expenses	108,963	106,272		78,367
Operating income	10,072	2,782		8,866
Other income, net:
Interest income	733	445		656
Interest expense	(102)	(25)		(48)
Other income, net	442	48		76
Total other income, net	1,073	468		684
Income before income taxes	11,145	3,250		9,550
Income tax provision	1,187	1,619		147
Net income	$ 9,958	$ 1,631		$ 9,403
Net income per common share:
Basic	$ 0.36	$ 0.06		$ 0.36
Diluted net income per common share:
Diluted	$ 0.35	$ 0.06		$ 0.35
Weighted average common shares:
Basic (shares)	27,905	27,083		26,432
Diluted (shares)	28,554	27,652		27,099
Product
Revenue:
Revenue	$ 224,530	$ 201,737		$ 169,425
Cost of sales:
Cost of sales	118,855	104,639		87,512
Service
Revenue:
Revenue	29,673	25,156		11,915
Cost of sales:
Cost of sales	$ 13,350	$ 10,329		$ 5,151

[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.