Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 76,271	$ 102,754
Restricted cash	23	297
Short-term investments	26,856	42,908
Accounts receivable, net	37,033	31,699
Prepaid expenses	5,353	2,563
Deferred costs	5,842	2,429
Other current assets	3,426	811
Total current assets	154,804	183,461
Property and equipment, net	2,918	2,796
Capitalized software development costs, net	12,734	10,005
Goodwill	53,132	31,328
Intangible assets, net	22,000	8,634
Deferred costs	8,747
Other assets	253	189
Total assets	254,588	236,413
Current liabilities:
Accounts payable	4,141	2,446
Accrued payroll and employee related liabilities	14,531	11,111
Accrued expenses	3,090	1,825
Deferred revenue	82,263	70,090
Note payable	432
Contingent liabilities		682
Other current liabilities	1,242	808
Total current liabilities	105,699	86,962
Long-term liabilities:
Deferred revenue, noncurrent	6,376	2,982
Convertible senior notes	92,916	89,481
Deferred tax liabilities	885	482
Other long term liabilities	989	515
Total liabilities	206,865	180,422
Commitments and contingencies
Stockholders' equity:
Preferred stock, par value $0.001, 10,000,000 shares authorized, no shares issued or outstanding as of September 30, 2018 and December 31, 2017, respectively
Common stock, $0.001 par value, 100,000,000 shares authorized, 29,625,465 and 28,330,460 shares issued and outstanding as of September 30, 2018 and December 31, 2017, respectively	29	28
Additional paid-in capital	187,909	164,995
Accumulated deficit	(137,865)	(109,252)
Accumulated other comprehensive income (loss)	(2,350)	220
Total stockholders’ equity	47,723	55,991
Total liabilities and stockholders’ equity	$ 254,588	$ 236,413