CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 107,769	$ 74,363
Short-term investments	118,924	137,904
Accounts receivable (net of allowance for doubtful accounts of $399 and $764 at March 31, 2020 and December 31, 2019, respectively)	74,378	94,827
Deferred commissions	28,751	28,499
Prepaid expenses and other current assets	25,632	27,369
Total current assets	355,454	362,962
Property and equipment, net	30,534	26,847
Deferred commissions (net of current portion)	41,991	43,766
Operating lease right-of-use assets	41,283	42,847
Acquired intangible assets, net	14,929	15,508
Goodwill	54,138	54,138
Other assets	11,245	12,544
Total assets	549,574	558,612
Current liabilities:
Accounts payable	4,404	1,732
Accrued expenses	14,536	8,436
Accrued compensation	23,357	36,634
Deferred revenue	270,916	274,348
Operating lease liabilities	4,866	5,209
Other current liabilities	750	1,284
Total current liabilities	318,829	327,643
Deferred revenue (net of current portion)	87,175	88,779
Operating lease liabilities (net of current portion)	40,301	40,663
Other liabilities	2,893	2,622
Total liabilities	449,198	459,707
Stockholders’ equity:
Common stock (par value: $0.01; 500,000 shares authorized; 100,003 and 98,587 shares issued and outstanding at March 31, 2020 and December 31, 2019, respectively)	1,000	986
Additional paid-in capital	687,311	662,990
Accumulated other comprehensive income	163	50
Accumulated deficit	(588,098)	(565,121)
Total stockholders’ equity	100,376	98,905
Total liabilities and stockholders’ equity	$ 549,574	$ 558,612