CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
OPERATING ACTIVITIES
Net income (loss)	$ 6,731	$ 3,853	$ (10,693)
Adjustments to reconcile net income (loss) to net cash provided by (used for) operating activities:
Depreciation expense	889	1,081	1,354
Gain on sale of equipment and property		(37)	(15)
Gain on benefit plan financing arrangement	(2,025)
Stock-based compensation expense	1,296	1,542	1,645
Excess tax benefits for share-based payments	(77)		(453)
Deferred income tax benefit	(76)	(132)	(854)
(Increase) decrease in assets:
Accounts receivable	(1,031)	87	4,310
Inventories	(3,025)	(2,395)	2,966
Prepaid expenses and other current assets	(10)	1,332	(1,102)
Income taxes receivable	558	5,823	(3,325)
Other non-current assets	(67)	(20)	(733)
Increase (decrease) in liabilities:
Accounts payable	1,108	(88)	535
Income taxes payable	327	68
Other accrued expenses	(1,281)	(163)	(3,570)
Other long-term liabilities	(21)	(72)	899
Net cash provided by (used for) operating activities	3,296	10,879	(9,036)
INVESTING ACTIVITIES
Capital expenditures	(357)	(191)	(85)
Proceeds from sale of assets		41	15
Proceeds from benefit plan financing arrangement	3,671
Re-investment in benefit plan financing arrangement	(3,671)
Sales and maturities of marketable securities	24,904	25,579	22,344
Purchases of marketable securities	(36,106)	(29,147)	(14,858)
Net cash (used for) provided by investing activities	(11,559)	(3,718)	7,416
FINANCING ACTIVITIES
Payment of dividends			(369)
Cash paid for common stock purchased and retired	(447)	(244)	(537)
Excess tax benefits for share-based payments	77		453
Proceeds received upon exercise of stock options	54	45	24
Net cash used for financing activities	(316)	(199)	(429)
Net (decrease) increase in cash and cash equivalents	(8,579)	6,962	(2,049)
Cash and cash equivalents at beginning of year	9,535	2,573	4,622
Cash and cash equivalents at end of year	$ 956	$ 9,535	$ 2,573

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Includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Entity may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Compensating balance arrangements that do not legally restrict the withdrawal or usage of cash amounts may be reported as Cash and Cash Equivalents, while legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits are not generally reported as cash and cash equivalents. Includes cash and cash equivalents associated with the entity's continuing operations. Excludes cash and cash equivalents associated with the disposal group (and discontinued operation).