CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 74,363	$ 165,116
Short-term investments	137,904	118,119
Accounts receivable (net of allowance for doubtful accounts of $764 and $188 at December 31, 2019 and 2018, respectively)	94,827	68,261
Deferred commissions	28,499	23,272
Prepaid expenses and other current assets	27,369	22,020
Total current assets	362,962	396,788
Property and equipment, net	26,847	11,348
Deferred commissions (net of current portion)	43,766	36,162
Operating lease right-of-use assets	42,847	8,504
Intangible assets, net	15,508	427
Goodwill	54,138	265
Other assets	12,544	7,118
Total assets	558,612	460,612
Current liabilities:
Accounts payable	1,732	171
Accrued expenses	8,436	5,554
Accrued compensation	36,634	29,594
Deferred revenue	274,348	213,644
Operating lease liabilities	5,209	4,262
Other current liabilities	1,284	1,079
Total current liabilities	327,643	254,304
Deferred revenue (net of current portion)	88,779	76,259
Operating lease liabilities (net of current portion)	40,663	6,055
Other liabilities	2,622	2,231
Total liabilities	459,707	338,849
Stockholders’ equity:
Common stock (par value: $0.01; 500,000 shares authorized, 98,587 and 93,126 shares issued and outstanding at December 31, 2019 and 2018, respectively)	986	931
Additional paid-in capital	662,990	586,940
Accumulated other comprehensive income	50	0
Accumulated deficit	(565,121)	(466,108)
Total stockholders’ equity	98,905	121,763
Total liabilities and stockholders’ equity	$ 558,612	$ 460,612