Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Sales of short-term investments	$ 29,381
Current assets
Cash and cash equivalents	31,242	$ 25,704
Short-term investments	179,995	204,164
Accounts receivable, net of allowance	39,210	42,547
Other receivables	6,263	6,312
Inventories	10,451	4,576
Prepaid expenses and other current assets	6,141	5,149
Total current assets	273,302	288,452
Property and equipment, net	8,070	8,661
Intangible assets, net	13,546	5,461
Goodwill	69,168	49,246
Deferred commissions	11,325	10,477
Other long-term assets	6,834	8,158
Total assets	382,245	370,455
Current liabilities
Accounts payable	4,832	6,036
Accrued payroll and other current liabilities	17,212	14,757
Deferred revenue, current	47,884	50,033
Total current liabilities	69,928	70,826
Deferred revenue, long-term	9,524	11,442
Convertible senior notes, net	122,511	117,178
Other long-term liabilities	2,922
Other long-term liabilities	8,580	7,184
Total liabilities	210,543	206,630
Commitments and contingencies (Note 9)
Stockholders' equity
Preferred stock, $0.0003 par value - 5,000,000 shares authorized as of September 30, 2020 and December 31, 2019; zero shares issued and outstanding	0	0
Common stock, $0.0003 par value - 100,000,000 shares authorized as of September 30, 2020 and December 31, 2019; 32,431,207 and 31,660,709 shares issued and outstanding as of September 30, 2020 and December 31, 2019, respectively	10	9
Additional paid-in capital	330,954	313,963
Accumulated other comprehensive income	841	179
Accumulated deficit	(160,103)	(150,326)
Total stockholders’ equity	171,702	163,825
Total liabilities and stockholders’ equity	$ 382,245	$ 370,455
Common stock par value	$ 0.0003	$ 0.0003