CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 57,128	$ 25,671
Restricted cash	0	699
Available-for-sale securities—short-term portion	0	9,366
Accounts receivable, net	50,862	53,893
Inventories—short-term portion	58,059	72,691
Deferred tax assets—short-term portion	767	359
Prepaid expenses and other current assets	8,920	10,126
Total current assets	175,736	172,805
Property and equipment, net	18,671	28,663
Inventories—long-term portion	5,972	11,772
Goodwill	161,595	159,736
Intangible assets, net	131,108	152,718
Deferred tax assets—long-term portion	355	3,394
Other long-term assets	11,074	15,206
Total assets	504,511	544,294
Current liabilities:
Accounts payable and accrued liabilities	45,534	50,355
Convertible notes—short-term portion	0	3,855
Term loan—short-term portion	12,750	12,713
Deferred revenue—short-term portion	18,660	8,498
Total current liabilities	76,944	75,421
Deferred revenue—long-term portion	2,824	3,450
Convertible notes	105,000	105,000
Term loan—long-term portion	26,700	60,563
Other long-term liabilities	21,496	22,689
Stockholders' equity:
Convertible preferred stock, $0.01 par value; 5,000 shares authorized; no shares issued and outstanding at December 31, 2013 and 2012	0	0
Common stock, $0.01 par value; 200,000 shares authorized; 72,305 and 71,030 shares issued and outstanding at December 31, 2013 and 2012, respectively	723	710
Additional paid-in capital	768,149	759,549
Accumulated other comprehensive income	8,392	6,302
Accumulated deficit	(505,717)	(489,390)
Total stockholders' equity	271,547	277,171
Total liabilities and stockholders' equity	$ 504,511	$ 544,294