CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jan. 31, 2016	Jan. 31, 2015
Current assets:
Cash and cash equivalents	$ 424,541	$ 387,315
Investments, current portion	584,498	462,849
Accounts receivable, net	181,665	128,413
Prepaid expenses and other current assets	26,565	21,256
Total current assets	1,217,269	999,833
Investments, non-current	1,500	165,082
Property and equipment, net	134,995	50,374
Intangible assets, net	49,482	10,416
Goodwill	123,318	19,070
Other assets	10,275	3,016
Total assets	1,536,839	1,247,791
Current liabilities:
Accounts payable	4,868	3,726
Accrued payroll and compensation	95,898	65,220
Accrued expenses and other liabilities	49,879	27,819
Deferred revenue, current portion	347,121	249,883
Total current liabilities	497,766	346,648
Deferred revenue, non-current	102,382	54,202
Other liabilities, non-current	77,277	33,620
Total non-current liabilities	179,659	87,822
Total liabilities	$ 677,425	$ 434,470
Commitments and contingencies (Note 3)
Stockholders’ equity
Preferred stock: $0.001 par value; 20,000,000 shares authorized; no shares issued or outstanding at January 31, 2016 and January 31, 2015	$ 0	$ 0
Common stock: $0.001 par value; 1,000,000,000 shares authorized; 131,543,467 shares issued and outstanding at January 31, 2016, and 123,538,492 shares issued and outstanding at January 31, 2015	132	123
Accumulated other comprehensive loss	(3,770)	(837)
Additional paid-in capital	1,528,647	1,200,858
Accumulated deficit	(665,595)	(386,823)
Total stockholders’ equity	859,414	813,321
Total liabilities and stockholders’ equity	$ 1,536,839	$ 1,247,791