Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Cash flows from (used in) operating activities
Net income	$ 78	$ 94
Adjustments to reconcile net income to net cash from (used in) operating activities:
Depreciation	16	13
Change in allowance for doubtful accounts	8	0
Deferred income taxes	3	6
Interest accrued on investments	0	(2)
Change in assets and liabilities:
Trade receivables	24	(110)
Inventories	5	(32)
Other current assets	(19)	(35)
Accounts payable	64	48
Accrued expenses	43	65
Deferred revenue	0	(6)
Accrued income taxes	35	55
Net cash from operating activities	257	96
Cash flows used in investing activities
Purchase of property and equipment	(21)	(2)
Net cash used in investing activities	(21)	(2)
Cash flows from (used in) financing activities
Proceeds from issuance of common stock	4	6
Dividends paid	(135)	(135)
Net cash used in financing activities	(131)	(129)
Net increase (decrease) in cash and cash equivalents	105	(35)
Cash and cash equivalents, beginning	5,476	583
Cash and cash equivalents, ending	5,581	548
Supplemental schedule of non-cash investing and financing activities
Net change in unrealized gain on investments	393	642
Supplemental cash flow information
Cash paid for income taxes	$ 11	$ 0