Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities:
Net loss	$ (23,359)	$ (32,298)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	2,377	1,751
Amortization of discount on debt	480	41
Stock-based compensation	5,038	2,231
Allowance for credit losses	1,198	741
Accretion on discount to marketable securities		(69)
Change in fair value of financial instrument	(4,413)
Changes in operating assets and liabilities:
Accounts receivable	(7,473)	(3,587)
Prepaid expenses	(3,675)	1,612
Deferred commissions	(1,454)	(2,482)
Accounts payable	1,685	(1,050)
Accrued and other current liabilities	4,319	2,920
Deferred revenue	2,077	(920)
Net cash used in operating activities	(23,200)	(31,110)
Cash flows from investing activities:
Purchase of property and equipment	(1,378)	(5,326)
Maturity of marketable securities		23,450
Net cash (used in) provided by investing activities	(1,378)	18,124
Cash flows from financing activities:
Proceeds from exercise of stock options	1,947	471
Payment of dividends	(12,814)
Proceeds from issuance of common stock upon initial public offering, net of underwriting discounts and commissions and other offering costs	171,128
Proceeds from debt	41,861	8,591
Repayment of debt	(6,715)	(1,538)
Net cash provided by financing activities	195,407	7,524
Net change in cash and cash equivalents and restricted cash	170,829	(5,462)
Cash and cash equivalents and restricted cash, beginning of period	9,150	13,897
Cash and cash equivalents and restricted cash, end of period	179,979	8,435
Supplemental cash flow information:
Cash paid for interest	1,519	$ 1,117
Noncash investing and financing activities:
Conversion of convertible preferred stock into common stock upon initial public offering	211,902
Conversion of convertible debt into common stock upon initial public offering	$ 50,173