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	$ (34,108)	$ (19,311)
Adjustments to reconcile net loss to net cash from operating activities:
Amortization of deferred implementation, solution and other costs	3,905	1,464
Depreciation and amortization	13,017	5,821
Amortization of debt issuance costs	459	250
Amortization of debt discount	5,031	2,298
Amortization of premiums on investments	(49)	(84)
Stock-based compensation expenses	14,866	9,154
Deferred income taxes	414	133
Allowance for credit losses	144	0
Allowance for sales credits	(14)	76
Loss on disposal of long-lived assets	3	0
Changes in operating assets and liabilities:
Accounts receivable, net	(4,537)	43
Prepaid expenses and other current assets	(2,970)	(2,385)
Deferred solution and other costs	(6,852)	(7,313)
Deferred implementation costs	(4,057)	(1,752)
Contract assets, net	(1,919)	(1,012)
Other long-term assets	2,819	1,192
Accounts payable	(284)	1,439
Accrued liabilities	(6,136)	(3,010)
Deferred revenues	6,794	3,853
Deferred rent and other long-term liabilities	(2,325)	(1,742)
Net cash used in operating activities	(15,799)	(10,886)
Cash flows from investing activities:
Purchases of investments	0	(9,662)
Maturities of investments	2,500	24,866
Purchases of property and equipment	(4,642)	(5,545)
Capitalized software development costs	(287)	0
Net cash provided by (used in) investing activities	(2,429)	9,659
Cash flows from financing activities:
Proceeds from exercise of stock options to purchase common stock	1,194	3,428
Net cash provided by financing activities	1,194	3,428
Net increase (decrease) in cash, cash equivalents, and restricted cash	(17,034)	2,201
Cash, cash equivalents, and restricted cash, beginning of period	103,562	110,156
Cash, cash equivalents, and restricted cash, end of period	86,528	112,357
Supplemental disclosures of cash flow information:
Cash paid for taxes, net of refund	134	0
Cash paid for interest	863	863
Supplemental disclosure of non-cash investing and financing activities:
Shares acquired to settle the exercise of stock options	(264)	(217)
Data center assets acquired under deferred payment arrangements or financing arrangements	$ 3,895	$ 0