Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 102,599	$ 103,051
Short-term investments	3,423	42,908
Accounts receivable, net	33,064	31,699
Prepaid expenses	4,949	2,563
Deferred costs	5,419	2,429
Other current assets	2,858	811
Total current assets	152,312	183,461
Property and equipment, net	2,722	2,796
Capitalized software development costs, net	11,487	10,005
Goodwill	53,048	31,328
Intangible assets, net	23,842	8,634
Deferred costs	7,792
Other assets	242	189
Total assets	251,445	236,413
Current liabilities:
Accounts payable	4,154	2,446
Accrued payroll and employee related liabilities	12,727	11,111
Accrued expenses	4,277	1,825
Deferred revenue	79,417	70,090
Note payable	440
Contingent liabilities		682
Other current liabilities	791	808
Total current liabilities	101,806	86,962
Long-term liabilities:
Deferred revenue, noncurrent	3,046	2,982
Convertible senior notes	91,755	89,481
Deferred tax liabilities	922	482
Other long term liabilities	1,079	515
Total liabilities	198,608	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 June 30, 2018 and December 31, 2017, respectively
Common stock, $0.001 par value, 100,000,000 shares authorized, 29,259,367 and 28,330,460 shares issued and outstanding as of June 30, 2018 and December 31, 2017, respectively	29	28
Additional paid-in capital	184,654	164,995
Accumulated deficit	(129,415)	(109,252)
Accumulated other comprehensive income (loss)	(2,431)	220
Total stockholders’ equity	52,837	55,991
Total liabilities and stockholders’ equity	$ 251,445	$ 236,413