CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 52,885	$ 55,635
Short-term investments	0	6,923
Accounts receivable, net	60,427	86,765
Inventories	35,130	41,193
Prepaid expenses and other current assets	24,318	26,319
Total current assets	172,760	216,835
Property and equipment, net	31,624	32,164
Goodwill	240,570	237,279
Intangibles, net	25,317	29,231
Other long-term assets	37,745	38,560
Total assets	508,016	554,069
Current liabilities:
Other debts and capital lease obligations, current	7,130	7,275
Accounts payable	31,322	28,892
Income taxes payable	1,349	1,166
Deferred revenue	55,165	52,414
Accrued and other current liabilities	50,272	55,150
Total current liabilities	145,238	144,897
Convertible notes, long-term	105,935	103,259
Other debts and capital lease obligations, long-term	9,292	13,915
Income taxes payable, long-term	2,996	2,926
Deferred tax liabilities, long-term	258	0
Other non-current liabilities	16,716	18,431
Total liabilities	280,435	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; 80,669 and 78,456 shares issued and outstanding at June 30, 2017 and December 31, 2016, respectively	81	78
Additional paid-in capital	2,260,886	2,254,055
Accumulated deficit	(2,030,384)	(1,976,222)
Accumulated other comprehensive loss	(3,002)	(7,270)
Total stockholders’ equity	227,581	270,641
Total liabilities and stockholders’ equity	$ 508,016	$ 554,069