Condensed Consolidated Statement of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Cash flows from operating activities:
Net income	$ 1,862	$ 6,739
Adjustments to reconcile net income to net cash and cash equivalents provided by operating activities:
Amortization of intangibles and other	506	531
Amortization of convertible note discount and issuance costs	664	0
Depreciation	1,112	1,050
Foreign currency exchange (gain) loss	418	(24)
Share-based compensation	974	1,281
Provision for (recovery of) doubtful accounts and inventory valuation	425	852
Change in operating assets and liabilities:
Accounts receivable	2,184	5,383
Inventories	(3,148)	(5,503)
Prepaid expenses and other assets	(1,588)	660
Accounts payable and accrued liabilities	4,936	1,228
Other current liabilities	(1,441)	(1,706)
Non-current liabilities	(40)	10
Net cash and cash equivalents provided by operating activities	6,864	10,501
Cash flows from investing activities:
Purchases of marketable securities	(31,832)	0
Proceeds from sales of marketable securities	18,245	204
Purchases of property, plant and equipment	(505)	(649)
Net cash and cash equivalents used in investing activities	(14,092)	(445)
Cash flows from financing activities:
Issuance of shares through share-based compensation plans	0	2
Tax benefit for sale of shares through share-based compensation plans	171	330
Net cash and cash equivalents provided by financing activities	171	332
Effect of exchange rate changes on cash and cash equivalents	(612)	(381)
Net increase (decrease) in cash and cash equivalents	(7,669)	10,007
Cash and cash equivalents at beginning of period	96,671	71,120
Cash and cash equivalents at end of period	89,002	81,127
Income taxes paid	693	437
Interest paid	$ 1,063	$ 0