Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands	6 Months Ended
Jun. 30, 2011	Jun. 30, 2010
Cash flows from operating activities
Net income	$ 212	$ 217
Adjustments to reconcile net income to net cash from (used in) operating activities:
Depreciation	28	49
Deferred income taxes	(7)	(12)
Interest accrued on investments	(3)	(2)
(Increase)/decrease in:
Trade receivables	(232)	8
Inventories	(155)	(53)
Other current assets	(2)	6
Accounts payable	96	47
Accrued expenses	133	108
Deferred revenue	(5)	(3)
Accrued income taxes	105	65
Net cash from operating activities	170	430
Cash flows from (used in) investing activities
Purchase of treasury bills	(4,300)	(5,048)
Proceeds from the maturity of treasury bills	4,300	4,980
Purchase of property and equipment	(9)	(2)
Net cash used in investing activities	(9)	(70)
Cash flows from (used in) financing activities
Proceeds from issuance of stock	18	7
Dividends paid	(272)	(270)
Net cash used in financing activities	(254)	(263)
Net increase (decrease) in cash and cash equivalents	(93)	97
Cash and cash equivalents, beginning	583	746
Cash and cash equivalents, ending	490	843
Supplemental schedule of non-cash investing and financing activities
Net change in unrealized gain on investments	561	176
Cash paid for income taxes	$ 52	$ 35

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