Unaudited Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities:
Net loss	$ (31,430)	$ (22,639)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation	2,098	1,337
Stock-based compensation	12,883	8,961
Amortization of deferred commissions	3,249	3,626
Amortization of operating lease right-of-use asset	1,960	1,399
Capital loss from sale of fixed assets	0	24
Changes in assets and liabilities:
Trade receivables	36,785	41,427
Prepaid expenses and other current assets	342	(623)
Deferred commissions	(2,236)	(4,870)
Other long-term assets	(82)	(19)
Trade payables	(174)	(1,996)
Accrued expenses and other short-term liabilities	(6,922)	(7,358)
Deferred revenues	(12,603)	(5,384)
Other long-term liabilities	4	170
Net cash provided by operating activities	3,874	14,055
Cash flows from investing activities:
Decrease (increase) in short-term deposits	(4,805)	9,120
Decrease in marketable securities	7,794	1,928
Decrease (increase) in long-term deposits	34	(12)
Purchase of property and equipment	(2,609)	(5,103)
Net cash provided by investing activities	414	5,933
Cash flows from financing activities:
Proceeds (withholdings) from employee stock plans, net	4,316
Proceeds (withholdings) from employee stock plans, net		(4,234)
Net cash provided by (used in) financing activities	4,316	(4,234)
Increase in cash and cash equivalents	8,604	15,754
Cash and cash equivalents at beginning of period	68,929	48,707
Cash and cash equivalents at end of period	77,533	64,461
Supplemental disclosure of cash flow information:
Cash paid for income taxes	$ 502	$ 2,543