Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash flows from operating activities
Net loss	$ (12,504)	$ (21,573)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	1,678	1,116
Amortization of discount on debt	389	27
Stock-based compensation	2,170	1,416
Allowance for credit losses	944	494
Accretion on discount to marketable securities		(69)
Change in fair value of financial instrument	(4,413)
Changes in operating assets and liabilities:
Accounts receivable	(6,005)	(3,748)
Prepaid expenses	(2,253)	821
Deferred commissions	(764)	(1,973)
Accounts payable	1,871	256
Accrued and other current liabilities	468	3,092
Deferred revenue	1,425	(1,017)
Net cash used in operating activities	(16,994)	(21,158)
Cash flows from investing activities:
Purchase of property and equipment	(1,045)	(4,069)
Maturity of marketable securities		23,450
Net cash (used in) provided by investing activities	(1,045)	19,381
Cash flows from financing activities:
Proceeds from exercise of stock options	896	172
Proceeds from debt	40,745	3,677
Repayment of debt	(6,241)	(1,025)
Net cash provided by financing activities	35,400	2,824
Net change in cash and cash equivalents and restricted cash	17,361	1,047
Cash and cash equivalents and restricted cash, beginning of period	9,150	13,897
Cash and cash equivalents and restricted cash, end of period	$ 26,511	$ 14,944