CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 55,292	$ 55,635
Short-term investments	0	6,923
Accounts receivable, net	69,771	86,765
Inventories	39,920	41,193
Prepaid expenses and other current assets	27,368	26,319
Total current assets	192,351	216,835
Property and equipment, net	31,733	32,164
Goodwill	237,911	237,279
Intangibles, net	27,208	29,231
Other long-term assets	41,496	38,560
Total assets	530,699	554,069
Current liabilities:
Other debts and capital lease obligations, current	6,802	7,275
Accounts payable	22,340	28,892
Income taxes payable	1,153	1,166
Deferred revenue	59,072	52,414
Accrued and other current liabilities	52,062	55,150
Total current liabilities	141,429	144,897
Convertible notes, long-term	104,575	103,259
Other debts and capital lease obligations, long-term	13,767	13,915
Income taxes payable, long-term	2,961	2,926
Other non-current liabilities	16,559	18,431
Total liabilities	279,291	283,428
Commitments and contingencies (Note 18)
Stockholders’ equity:
Preferred stock, $0.001 par value, 5,000 shares authorized; no shares issued or outstanding	0	0
Common stock, $0.001 par value, 150,000 shares authorized; 80,503 and 78,456 shares issued and outstanding at March 31, 2017 and December 31, 2016, respectively	81	78
Additional paid-in capital	2,257,093	2,254,055
Accumulated deficit	(1,998,884)	(1,976,222)
Accumulated other comprehensive loss	(6,882)	(7,270)
Total stockholders’ equity	251,408	270,641
Total liabilities and stockholders’ equity	$ 530,699	$ 554,069