Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Cash flows from (used in) operating activities
Net income	$ 405	$ 330
Adjustments to reconcile net income to net cash from operating activities:
Depreciation	48	42
Deferred income taxes	2	24
Interest accrued on investments	0	(3)
Stock option expense	6	0
Change in allowance for doubtful accounts	(1)	0
Loss on disposal of fixed assets	0	18
Change in:
Trade receivables	61	(251)
Inventories	(154)	(164)
Other current assets	(12)	(17)
Income tax receivable	0	54
Accounts payable	96	77
Accrued expenses	145	176
Deferred revenue	0	(12)
Accrued income taxes	85	40
Net cash from operating activities	681	314
Cash flows from (used in) investing activities
Purchase of treasury bills	0	(4,300)
Proceeds from the maturity of treasury bills	0	9,500
Purchase of property and equipment	(50)	(69)
Net cash from (used in) investing activities	(50)	5,131
Cash flows from (used in) financing activities
Proceeds from issuance of stock	8	21
Dividends paid	(407)	(408)
Net cash used in financing activities	(399)	(387)
Net increase in cash and cash equivalents	232	5,058
Cash and cash equivalents, beginning	5,476	583
Cash and cash equivalents, ending	5,708	5,641
Supplemental schedule of non-cash investing and financing activities
Net change in unrealized gain (loss) on investments	263	(301)
Supplemental cash flow information
Cash paid for income taxes	$ 158	$ 112