Statement of Financial Position (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Cash and Cash Equivalents, at Carrying Value	$ 43,114	$ 80,790
Marketable Securities, Current	113,871	86,582
Accounts Receivable, less allowance of $1,152 in 2013 and $1,279 in 2014	51,603	53,437
Inventory, Net	63,344	61,351
Income Taxes Receivable	1,458	2,832
Deferred Income Taxes and Other Tax Receivable, Current	8,986	8,786
Prepaid Expense and Other Assets	7,945	3,186
Assets, Current	290,321	296,964
Property, Plant and Equipment, Net	12,938	13,058
Goodwill	22,495	22,553
Intangible Assets, Net (Excluding Goodwill)	9,042	11,464
Deferred Tax Assets, Net of Valuation Allowance, Noncurrent	30,348	25,546
Other Assets, Noncurrent	1,493	1,777
Assets	366,637	371,362
Accounts Payable, Current	6,843	3,095
Employee-related Liabilities, Current	8,831	7,457
Accrued Royalties	499	669
Product Warranty Accrual, Current	1,574	1,551
Deferred Revenue	7,976	8,786
Other Liabilities, Current	10,143	10,132
Liabilities, Current	35,866	31,690
Convertible Debt, Noncurrent	54,773	51,751
Other Liabilities, Noncurrent	8,670	8,918
Liabilities	99,309	92,359
Preferred stock issued and outstanding	0	0
Common Stock, Value, Issued	32	33
Additional Paid in Capital, Common Stock	409,562	415,739
Accumulated Other Comprehensive Income (Loss), Net of Tax	(2,652)	(1,795)
Retained Earnings (Accumulated Deficit)	(139,614)	(134,974)
Stockholders' Equity Attributable to Parent	267,328	279,003
Liabilities and Equity	$ 366,637	$ 371,362