Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash flows from (used in) operating activities
Net income	$ 166	$ 78
Adjustments to reconcile net income to net cash from (used in) operating activities:
Depreciation	27	16
Gain on sale of available-for-sale securities	(103)	0
Deferred income taxes	40	3
Interest accrued on investments	(2)	0
Change in allowance for doubtful accounts	(2)	8
Change in:
Trade receivables	(98)	24
Inventories	7	5
Other current assets	(61)	(19)
Accounts payable	28	64
Accrued expenses	47	43
Accrued income taxes	(289)	35
Net cash from (used in) operating activities	(240)	257
Cash flows from (used in) investing activities
Proceeds from sale of available-for-sale securities	104	0
Purchase of property and equipment	(11)	(21)
Net cash from (used in) investing activities	93	(21)
Cash flows from (used in) financing activities:
Proceeds from issuance of common stock	6	4
Dividends paid	(136)	(135)
Net cash used in financing activities	(130)	(131)
Net increase (decrease) in cash and cash equivalents	(277)	105
Cash and cash equivalents, beginning	1,102	5,476
Cash and cash equivalents, ending	825	5,581
Supplemental schedule of non-cash investing and financing activities
Net change in unrealized gain (loss) on available-for-sale securities	(335)	393
Supplemental cash flow information
Cash paid for income taxes	$ 272	$ 11