Condensed Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash flows from operating activities:
Net loss	$ (9,627)	$ (10,249)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Amortization of deferred implementation, solution and other costs	2,117	2,030
Depreciation and amortization	2,556	2,030
Amortization of debt issuance costs	48	48
Amortization of premiums on investments	108	0
Stock-based compensation expenses	2,961	1,986
Allowance for sales credits	(7)	51
Changes in operating assets and liabilities:
Accounts receivable, net	(1,972)	3,545
Prepaid expenses and other current assets	90	(890)
Deferred solution and other costs	(1,806)	(1,633)
Deferred implementation costs	(1,676)	(1,836)
Other long-term assets	(50)	330
Accounts payable	1,488	(1,036)
Accrued liabilities	(174)	(3,643)
Deferred revenues	6,662	4,798
Deferred rent and other long-term liabilities	(387)	355
Net cash provided by (used in) operating activities	331	(4,114)
Cash flows from investing activities:
Purchases of investments	(39,173)	0
Maturities of investments	10,833	0
Purchases of property and equipment	(2,321)	(2,468)
Decrease in restricted cash	116	0
Net cash used in investing activities	(30,545)	(2,468)
Cash flows from financing activities:
Proceeds from borrowings on line of credit	0	12,500
Payments on line of credit	0	(16,710)
Payments on financing obligations	(2,205)	0
Payments on capital lease obligations	(230)	(446)
Proceeds from the issuance of common stock, net of issuance costs	32,333	86,461
Proceeds from exercise of stock options to purchase common stock	1,713	1,008
Shares acquired to settle the exercise of stock options	(7)	0
Net cash provided by financing activities	31,604	82,813
Net increase in cash and cash equivalents	1,390	76,231
Cash and cash equivalents, beginning of period	67,979	18,675
Cash and cash equivalents, end of period	69,369	94,906
Supplemental disclosures of cash flow information:
Cash paid for taxes	60	55
Cash paid for interest	$ 105	$ 207