CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 79,923	$ 57,128
Accounts receivable, net	46,896	50,862
Inventories—short-term portion	50,676	58,059
Deferred tax assets—short-term portion	3,778	767
Prepaid expenses and other current assets	9,197	8,920
Total current assets	190,470	175,736
Property and equipment, net	18,087	18,671
Inventories—long-term portion	5,956	5,972
Goodwill	156,178	161,595
Intangible assets, net	106,183	131,108
Deferred tax assets—long-term portion	303	355
Other long-term assets	9,371	11,074
Total assets	486,548	504,511
Current liabilities:
Accounts payable and accrued liabilities	53,063	45,534
Term loan—short-term portion	4,000	12,750
Deferred revenue—short-term portion	9,210	18,660
Total current liabilities	66,273	76,944
Deferred revenue—long-term portion	2,372	2,824
Convertible notes	105,000	105,000
Term loan—long-term portion	18,950	26,700
Other long-term liabilities	21,626	21,496
Stockholders' equity:
Convertible preferred stock, $0.01 par value; 5,000 shares authorized; no shares issued and outstanding at December 31, 2014 or 2013	0	0
Common stock, $0.01 par value; 200,000 shares authorized; 74,287 and 72,305 shares issued and outstanding at December 31, 2014 and 2013, respectively	743	723
Additional paid-in capital	781,747	768,149
Accumulated other comprehensive income (loss)	(612)	8,392
Accumulated deficit	(509,551)	(505,717)
Total stockholders' equity	272,327	271,547
Total liabilities and stockholders' equity	$ 486,548	$ 504,511