Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 102,754	$ 60,765
Restricted cash	297
Investments	42,908
Accounts receivable, net	31,699	17,812
Prepaid expenses	2,563	1,770
Other current assets	3,240	2,536
Total current assets	183,461	82,883
Property and equipment, net	2,796	2,923
Capitalized software development costs, net	10,005	8,792
Goodwill	31,328	9,676
Intangible assets, net	8,634	3,940
Other assets	189	108
Total assets	236,413	108,322
Current liabilities:
Accounts payable	2,446	2,434
Accrued payroll and employee related liabilities	11,111	7,456
Accrued expenses	1,825	1,957
Deferred revenue	70,090	51,388
Contingent consideration liabilities	682
Other current liabilities	808	548
Total current liabilities	86,962	63,783
Long-term liabilities:
Deferred revenue, noncurrent	2,982	1,246
Convertible senior notes	89,481
Deferred tax liabilities	482	494
Other long term liabilities	515	447
Total liabilities	180,422	65,970
Commitments and contingencies
Stockholders’ equity:
Preferred stock, par value $0.001, 10,000,000 shares authorized, no shares issued or outstanding as of December 31, 2017 and December 31, 2016, respectively
Common stock, $0.001 par value, 100,000,000 shares authorized, 28,330,460 and 27,150,674 shares issued and outstanding as of December 31, 2017 and December 31, 2016, respectively	28	27
Additional paid-in capital	164,995	132,246
Accumulated deficit	(109,252)	(89,618)
Accumulated other comprehensive loss	220	(303)
Total stockholders’ equity	55,991	42,352
Total liabilities and stockholders’ equity	$ 236,413	$ 108,322