CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 57,024	$ 55,635
Short-term investments	0	6,923
Accounts receivable, net	69,844	86,765
Inventories	25,976	41,193
Prepaid expenses and other current assets	18,931	26,319
Total current assets	171,775	216,835
Property and equipment, net	29,265	32,164
Goodwill	242,827	237,279
Intangibles, net	21,279	29,231
Other long-term assets	42,913	38,560
Total assets	508,059	554,069
Current liabilities:
Other debts and capital lease obligations, current	7,610	7,275
Accounts payable	33,112	28,892
Income taxes payable	233	1,166
Deferred revenue	52,429	52,414
Accrued and other current liabilities	48,705	55,150
Total current liabilities	142,089	144,897
Convertible notes, long-term	108,748	103,259
Other debts and capital lease obligations, long-term	15,336	13,915
Income taxes payable, long-term	917	2,926
Other non-current liabilities	22,626	18,431
Total liabilities	289,716	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; 82,554 and 78,456 shares issued and outstanding at December 31, 2017 and 2016, respectively	83	78
Additional paid-in capital	2,272,690	2,254,055
Accumulated deficit	(2,057,812)	(1,976,222)
Accumulated other comprehensive income (loss)	3,382	(7,270)
Total stockholders’ equity	218,343	270,641
Total liabilities and stockholders’ equity	$ 508,059	$ 554,069

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.