Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Cash flows from (used in) operating activities
Net income	$ 1,094us-gaap_NetIncomeLoss	$ 706us-gaap_NetIncomeLoss
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	209	110
Realized gain on sale of available-for-sale securities	(1,163)us-gaap_GainLossOnInvestments	(530)us-gaap_GainLossOnInvestments
Change in allowance for doubtful accounts	2us-gaap_ProvisionForDoubtfulAccounts	(2)us-gaap_ProvisionForDoubtfulAccounts
Deferred income taxes	(81)us-gaap_DeferredIncomeTaxExpenseBenefit	(71)us-gaap_DeferredIncomeTaxExpenseBenefit
Stock-based compensation expense	67us-gaap_StockOptionPlanExpense	162us-gaap_StockOptionPlanExpense
Other	(1)us-gaap_OtherNoncashIncomeExpense	(5)us-gaap_OtherNoncashIncomeExpense
Changes in operating assets and liabilities, net of acquisition:
Trade receivables	6	(142)
Inventories	(164)us-gaap_IncreaseDecreaseInInventories	270us-gaap_IncreaseDecreaseInInventories
Current assets, other	18	(60)
Accounts payable	67	(35)
Accrued expenses	127	38
Accrued income taxes	82	(314)
Net cash from operating activities	263	127
Cash flows from (used in) investing activities:
Proceeds from sale of available-for-sale securities	1,178	536
Purchase of treasury bills	(14,184)	(6,425)
Proceeds from the maturity of treasury bills	12,871	6,451
Cash paid for acquisition	(400)	0
Purchase of property and equipment	(46)	(23)
Net cash from (used in) investing activities	(581)	539
Cash flows from (used in) financing activities:
Proceeds from issuance of common stock	3	9
Dividends paid	0us-gaap_PaymentsOfDividends	(272)us-gaap_PaymentsOfDividends
Net cash from (used in) financing activities	3	(263)
Net increase (decrease) in cash and cash equivalents	(315)	403
Cash and cash equivalents, beginning	1,505	1,102
Cash and cash equivalents, ending	1,190	1,505
Supplemental cash flow information
Cash paid during the year for income taxes	462us-gaap_IncomeTaxesPaid	617us-gaap_IncomeTaxesPaid
Cash paid during the year for interest	0us-gaap_InterestPaid	0us-gaap_InterestPaid
Supplemental disclosures of non-cash investment and financing activities
Note payable issued to fund acquisition, net of discount	771	0
Contingent consideration liability recorded in connection with the acquisition	$ 472	$ 0

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