Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 235,130	$ 59,978
Restricted cash	94	90
Short-term investments	3,496	45,541
Accounts receivable, net	42,400	41,107
Prepaid expenses	8,358	4,890
Deferred costs	6,867	6,503
Other current assets	2,739	4,406
Total current assets	299,084	162,515
Property and equipment, net	6,034	4,650
Capitalized software development costs, net	13,850	12,893
Goodwill	51,466	48,382
Intangible assets, net	25,242	23,197
Deferred costs	10,692	10,265
Restricted cash	3,031
Other assets	15,180	278
Total assets	424,579	262,180
Current liabilities:
Accounts payable	5,126	2,719
Accrued payroll and employee related liabilities	14,244	17,108
Accrued expenses	4,892	5,565
Deferred revenue	95,046	92,738
Note payable		427
Other current liabilities	5,443	1,490
Total current liabilities	124,751	120,047
Long-term liabilities:
Deferred revenue, noncurrent	2,993	2,898
Convertible senior notes	96,521	94,097
Deferred tax liabilities	1,105	1,032
Other long term liabilities	13,669	1,948
Total liabilities	239,039	220,022
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, 2019 and December 31, 2018, respectively
Common stock, $0.001 par value, 100,000,000 shares authorized, 33,150,319 and 29,700,192 shares issued and outstanding as of June 30, 2019 and December 31, 2018, respectively	33	30
Additional paid-in capital	364,149	194,866
Accumulated deficit	(173,867)	(147,670)
Accumulated other comprehensive loss	(4,775)	(5,068)
Total stockholders’ equity	185,540	42,158
Total liabilities and stockholders’ equity	$ 424,579	$ 262,180