Condensed Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash flows from operating activities:
Net loss	$ (28,841)	$ (16,643)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Amortization of deferred implementation, solution and other costs	4,928	3,750
Depreciation and amortization	8,935	4,429
Amortization of debt issuance costs	72	72
Amortization of premiums on investments	324	225
Stock-based compensation expenses	8,821	4,872
Deferred income taxes	208	0
Allowance for sales credits	(29)	(37)
Loss on disposal of long-lived assets	102	0
Unoccupied lease charges	33	0
Changes in operating assets and liabilities:
Accounts receivable, net	(7,265)	(3,420)
Prepaid expenses and other current assets	(2,062)	326
Deferred solution and other costs	(6,617)	(4,679)
Deferred implementation costs	(4,784)	(3,064)
Other long-term assets	(109)	137
Accounts payable	1,361	1,104
Accrued liabilities	7,841	1,611
Deferred revenues	12,319	11,692
Deferred rent and other long-term liabilities	3,316	(71)
Net cash (used in) provided by operating activities	(1,389)	378
Cash flows from investing activities:
Purchases of investments	(32,024)	(41,418)
Maturities of investments	34,650	17,418
Purchases of property and equipment	(13,553)	(3,570)
Business combinations, net of cash acquired	(95)	(18,583)
Capitalized software development costs	(1,932)	0
Purchases of other intangible assets	(263)	0
Increase in restricted cash	0	(486)
Net cash used in investing activities	(13,217)	(46,639)
Cash flows from financing activities:
Payments on financing obligations	(4,890)	(2,873)
Payments on capital lease obligations	(161)	(324)
Proceeds from the issuance of common stock, net of issuance costs	(8)	53,045
Proceeds from exercise of stock options to purchase common stock	4,462	3,623
Shares acquired to settle the exercise of stock options	(223)	(20)
Net cash (used in) provided by financing activities	(820)	53,451
Net (decrease) increase in cash and cash equivalents	(15,426)	7,190
Cash and cash equivalents, beginning of period	67,049	67,979
Cash and cash equivalents, end of period	51,623	75,169
Supplemental disclosures of cash flow information:
Cash paid for taxes	120	60
Cash paid for interest	167	180
Non-cash investing activities:
Acquisition consideration payable to seller - working capital adjustment	$ 0	$ 980