Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Cash flows from (used in) operating activities
Net Income	$ 548	$ 527
Adjustments to reconcile net income to net cash from (used in) operating activities:
Depreciation	57	92
Realized gain on sale of investments	(73)	0
Interest accrued on investments	(3)	(2)
Loss on disposal of fixed assets	18	0
Change in allowance for doubtful accounts	0	(2)
Deferred income taxes	14	3
Changes in assets and liabilities:
Trade receivables	(118)	202
Inventories	(188)	(149)
Other current assets	(35)	3
Accounts payable	35	(4)
Accrued expenses	29	23
Deferred revenue	(12)	(6)
Accrued income taxes	37	(69)
Net cash from operating activities	309	618
Cash flows from (used in) investing activities:
Proceeds from sale of available-for-sale securities	2	0
Purchase of treasury bills	(4,300)	(14,545)
Proceeds from the sale of treasury bills	9,500	14,330
Amount paid on the sale of the AutoData Systems Division	(14)	0
Purchase of property and equipment	(82)	(38)
Net cash from (used in) investing activities	5,106	(253)
Cash flows from (used in) financing activities:
Proceeds from issuance of stock	21	12
Dividends paid	(543)	(540)
Net cash used in financing activities	(522)	(528)
Net increase (decrease) in cash and cash equivalents	4,893	(163)
Cash and cash equivalents, beginning	583	746
Cash and cash equivalents, ending	5,476	583
Supplemental schedule of non-cash investing and financing activities
Net change in unrealized gain on investments, net of tax	218	321
Cash paid during the year for income taxes	$ 152	$ 252