CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Net revenues:
Revenues	$ 94,364	$ 86,453
Cost of revenues:
Total cost of revenues	32,948	33,302
Gross profit	61,416	53,151
Operating expenses:
Research and development	15,417	15,425
Marketing and selling	20,744	25,289
General and administrative	13,635	12,744
Restructuring costs, net	1,074	145
Total operating expenses	50,870	53,603
Operating income (loss)	10,546	(452)
Interest and other expense, net	(5,673)	(5,283)
Income (loss) before income taxes	4,873	(5,735)
Provision for income taxes	482	122
Net income (loss)	$ 4,391	$ (5,857)
Net income (loss) per common share – basic and diluted	$ 0.10	$ (0.14)
Weighted-average common shares outstanding – basic	44,559	43,254
Weighted-average common shares outstanding – diluted	46,204
Products
Net revenues:
Revenues	$ 33,267	$ 34,711
Cost of revenues:
Cost of revenues	19,493	20,962
Services
Net revenues:
Revenues	61,097	51,742
Cost of revenues:
Cost of revenues	$ 13,455	$ 12,340