CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 43,674	$ 25,671
Restricted cash	412	699
Available-for-sale securities	0	9,366
Accounts receivable, net	46,962	53,893
Inventories—short-term portion	69,210	72,691
Deferred tax assets—short-term portion	294	359
Prepaid expenses and other current assets	8,632	10,126
Total current assets	169,184	172,805
Property and equipment, net	23,330	28,663
Inventories—long-term portion	6,454	11,772
Goodwill	159,108	159,736
Intangible assets, net	140,610	152,718
Deferred tax assets—long-term portion	401	3,394
Other long-term assets	13,086	15,206
Total assets	512,173	544,294
Current liabilities:
Accounts payable and accrued liabilities	38,977	50,355
Convertible notes—short-term portion	0	3,855
Term loan—short-term portion	12,750	12,713
Deferred revenue—short-term portion	19,382	8,498
Total current liabilities	71,109	75,421
Deferred revenue—long-term portion	3,303	3,450
Convertible notes	105,000	105,000
Term loan—long-term portion	54,150	60,563
Other long-term liabilities	20,813	22,689
Stockholders’ equity:
Common stock	714	710
Additional paid-in capital	763,176	759,549
Accumulated other comprehensive income	4,842	6,302
Accumulated deficit	(510,934)	(489,390)
Total stockholders’ equity	257,798	277,171
Total liabilities and stockholders’ equity	$ 512,173	$ 544,294