Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Current Assets:
Cash and cash equivalents	$ 96,671	$ 71,120
Marketable securities	70,888	629
Accounts receivable, less allowance of $306 in 2010 and $262 in 2011	41,036	58,814
Inventories	49,501	52,311
Income taxes receivable	1,747	1,141
Prepaid expenses and other current assets	3,258	2,514
Total current assets	263,101	186,529
Property, plant and equipment, net	12,530	13,677
Goodwill	4,492	4,492
Identifiable intangible assets, net	7,814	9,571
Capitalized software	562	895
Deferred income taxes	12,240	3,217
Other assets	5,172	672
Total assets	305,911	219,053
Current liabilities:
Accounts payable	4,439	7,864
Accrued liabilities:
Payroll and related expenses	5,696	4,651
Royalties	660	517
Warranty	1,406	1,654
Deferred revenue	7,332	8,662
Other current liabilities	9,324	3,436
Total current liabilities	28,857	26,784
Convertible senior notes	46,524	0
Other non-current liabilities	8,752	7,235
Total liabilities	84,133	34,019
Commitments and contingencies (Note 9)
Stockholders’ equity:
Preferred stock, $0.001 par value, 5,000 shares authorized, no shares issued and outstanding at December 31, 2010 and 2011	0	0
Common stock, $0.001 par value, 50,000 shares authorized, 31,417 and 31,883 issued and outstanding at December 31, 2010 and 2011, respectively	32	31
Additional paid-in capital	405,505	393,456
Accumulated other comprehensive loss	(1,462)	(930)
Accumulated deficit	(182,297)	(207,523)
Total stockholders’ equity	221,778	185,034
Total liabilities and stockholders’ equity	$ 305,911	$ 219,053