CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities:
Net loss	$ (11,669,000)	$ (15,216,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	1,511,000	798,000
Bad debt expense	200,000	0
Loss on disposal of property and equipment	7,000	0
Deferred income taxes	0	(3,000)
Stock-based compensation	3,476,000	7,225,000
Changes in assets and liabilities:
Accounts receivable	5,751,000	(844,000)
Prepaid expenses and other assets	37,000	1,252,000
Deferred commissions	525,000	(2,895,000)
Accounts payable and accrued expenses	(1,800,000)	1,577,000
Accrued compensation and related benefits	(399,000)	(1,485,000)
Other current liabilities	(154,000)	(138,000)
Deferred revenue	(2,503,000)	1,908,000
Operating lease liabilities	1,159,000	0
Deferred rent, non-current	0	3,698,000
Net cash used in operating activities	(3,859,000)	(4,123,000)
Cash flows from investing activities:
Payments for acquisitions, net of cash acquired	(6,138,000)	0
Purchases of property and equipment	(202,000)	(16,595,000)
Net cash used in investing activities	(6,340,000)	(16,595,000)
Cash flows from financing activities:
Principal payments on finance leases	(357,000)	0
Proceeds from exercise of common stock options	670,000	1,073,000
Net cash provided by financing activities	313,000	1,073,000
Effect of foreign exchange rate changes on cash and cash equivalents	(706,000)	68,000
Net decrease in cash and cash equivalents	(10,592,000)	(19,577,000)
Cash and cash equivalents, beginning of period	159,755,000	94,930,000
Cash and cash equivalents, end of period	149,163,000	75,353,000
Supplemental disclosure of cash flow information:
Cash paid for interest	49,000	69,000
Cash paid for income taxes	$ 43,000	$ 43,000