CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 104,009	$ 79,923
Accounts receivable, net	48,526	46,896
Inventories, net—short-term portion	50,701	50,676
Deferred tax assets—short-term portion	3,781	3,778
Prepaid expenses and other current assets	11,969	9,197
Total current assets	218,986	190,470
Property and equipment, net	18,576	18,087
Inventories, net—long-term portion	4,809	5,956
Goodwill	151,789	156,178
Intangible assets, net	99,479	106,183
Deferred tax assets—long-term portion	308	303
Other long-term assets	9,343	9,371
Total assets	503,290	486,548
Current liabilities:
Accounts payable and accrued liabilities	43,110	53,063
Current portion of long-term debt	4,000	4,000
Deferred revenue—short-term portion	8,748	9,210
Total current liabilities	55,858	66,273
Deferred revenue—long-term portion	2,515	2,372
Convertible notes	105,000	105,000
Term loan—long-term portion	17,950	18,950
Other long-term liabilities	20,643	21,626
Total liabilities	201,966	214,221
Stockholders’ equity:
Common stock	773	743
Additional paid-in capital	812,438	781,747
Accumulated other comprehensive loss	(6,722)	(612)
Accumulated deficit	(505,165)	(509,551)
Total stockholders’ equity	301,324	272,327
Total liabilities and stockholders’ equity	$ 503,290	$ 486,548