Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Dec. 31, 2019
Sales of short-term investments	$ 14,393
Current assets
Cash and cash equivalents	29,386	$ 25,704
Short-term investments	204,476	204,164
Accounts receivable, net of allowance	28,255	42,547
Other receivables	6,645	6,312
Inventories	8,556	4,576
Prepaid expenses and other current assets	5,607	5,149
Total current assets	282,925	288,452
Property and equipment, net	7,669	8,661
Intangible assets, net	4,834	5,461
Goodwill	49,246	49,246
Deferred commissions	11,118	10,477
Other long-term assets	7,246	8,158
Total assets	363,038	370,455
Current liabilities
Accounts payable	4,765	6,036
Accrued payroll and other current liabilities	17,079	14,757
Deferred revenue, current	43,841	50,033
Total current liabilities	65,685	70,826
Deferred revenue, long-term	10,173	11,442
Convertible senior notes, net	120,682	117,178
Other long-term liabilities	3,530
Other long-term liabilities	5,843	7,184
Total liabilities	202,383	206,630
Commitments and contingencies (Note 9)
Stockholders' equity
Preferred stock, $0.0003 par value - 5,000,000 shares authorized as of June 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 June 30, 2020 and December 31, 2019; 32,347,972 and 31,660,709 shares issued and outstanding as of June 30, 2020 and December 31, 2019, respectively	9	9
Additional paid-in capital	323,881	313,963
Accumulated other comprehensive income	1,029	179
Accumulated deficit	(164,264)	(150,326)
Total stockholders’ equity	160,655	163,825
Total liabilities and stockholders’ equity	$ 363,038	$ 370,455