CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss	$ (5,573)	$ (14,371)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization expense	1,180	696
Amortization of intangible assets	696	564
Non-cash operating lease cost	1,100
Change in fair value of contingent consideration	84	674
Allowance for doubtful accounts	235	98
Stock-based compensation expense	8,063	5,510
Deferred income taxes	0	(1,396)
Changes in operating assets and liabilities, net of impact of acquisitions:
Accounts receivable, net	(11,806)	(11,916)
Inventories	9,738	472
Deferred costs	(11,196)	(5,510)
Prepaid expenses and other assets	(764)	(2,609)
Accounts payable	(98)	3,142
Accrued expenses and other liabilities	(3,024)	(480)
Operating lease liabilities	(546)
Deferred revenue	1,500	75
Advance payments from partner	0	(136)
Net cash used in operating activities	(10,411)	(25,187)
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of property and equipment	(1,762)	(340)
Capitalized internal-use software costs	(1,325)	(1,284)
Acquisitions, net of cash acquired	0	(27,435)
Net cash used in investing activities	(3,087)	(29,059)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from exercise of stock options, net of repurchases	1,722	314
Payment of deferred offering costs	(286)	0
Payment of deferred acquisition-related contingent consideration	(884)	0
Taxes paid related to net share settlement of equity awards	(10,564)	0
Net cash (used in) provided by financing activities	(10,012)	314
Net decrease in cash, cash equivalents, and restricted cash	(23,510)	(53,932)
Cash, cash equivalents, and restricted cash, beginning of period	243,008	109,107
Cash, cash equivalents, and restricted cash, end of period	219,498	55,175
Reconciliation of cash, cash equivalents, and restricted cash:
Cash and cash equivalents	218,228	54,996
Restricted cash	1,270	179
SUPPLEMENTAL DISCLOSURES OF NONCASH INVESTING AND FINANCING ACTIVITIES:
Accretion of redeemable convertible preferred stock	0	41
Purchases of property and equipment included in accounts payable and accrued liabilities	491	112
Contingent consideration liability	0	3,300
Unpaid working capital adjustment related to myStrength acquisition	0	119
Capitalized internal-use software costs in accounts payable and accrued liabilities	(141)	(163)
Common Stock
SUPPLEMENTAL DISCLOSURES OF NONCASH INVESTING AND FINANCING ACTIVITIES:
Unpaid offering costs	$ 0	$ 331