Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Cash flows from (used in) operating activities
Net income	$ 553us-gaap_NetIncomeLoss	$ 400us-gaap_NetIncomeLoss
Adjustments to reconcile net income to net cash from (used in) operating activities:
Depreciation and amortization	88	33
Realized gain on sale of available-for-sale securities	(815)us-gaap_GainLossOnInvestments	(547)us-gaap_GainLossOnInvestments
Change in allowance for doubtful accounts	(2)us-gaap_ProvisionForDoubtfulAccounts	2us-gaap_ProvisionForDoubtfulAccounts
Deferred income taxes	40us-gaap_DeferredIncomeTaxExpenseBenefit	10us-gaap_DeferredIncomeTaxExpenseBenefit
Stock-based compensation expense	16us-gaap_StockOptionPlanExpense	14us-gaap_StockOptionPlanExpense
Other	(1)us-gaap_OtherNoncashIncomeExpense	(1)us-gaap_OtherNoncashIncomeExpense
Change in, net of acquisition:
Trade receivables	(186)	(132)
Inventories	(122)us-gaap_IncreaseDecreaseInInventories	37us-gaap_IncreaseDecreaseInInventories
Current assets, other	(16)	(13)
Accounts payable	101	61
Accrued expenses	5	73
Accrued income taxes	140	200
Net cash from (used in) operating activities	(199)	137
Cash flows from (used in) investing activities
Proceeds from sale of available-for-sale securities	825	554
Purchases of treasury bills	(2,499)	(1,933)
Proceeds from the maturity of treasury bills	2,700	1,828
Cash paid for acquisition	0	(400)
Purchase of property and equipment	(5)	(13)
Net cash from investing activities	1,021	36
Cash flows from (used in) financing activities
Proceeds from issuance of common stock	0	4
Payments on long-term debt	(381)us-gaap_RepaymentsOfUnsecuredDebt	0us-gaap_RepaymentsOfUnsecuredDebt
Net cash from (used in) financing activities	(381)	4
Net increase in cash and cash equivalents	441	177
Cash and cash equivalents, beginning	1,190	1,505
Cash and cash equivalents, ending	1,631	1,682
Supplemental cash flow information
Cash paid for income taxes	116us-gaap_IncomeTaxesPaid	5us-gaap_IncomeTaxesPaid
Cash paid for interest	19us-gaap_InterestPaid	0us-gaap_InterestPaid
Supplemental disclosures of non-cash investment and financing activities
Note payable issued to fund acquisition, net of discount	0	771
Contingent consideration liability recorded in connection with the acquisition	$ 0	$ 472

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Period Type:	duration

- Definition

The noncash expense that accounts for the value of stock or unit options distributed to employees as compensation.

+ References

+ Details

Name:	us-gaap_StockOptionPlanExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_SupplementalCashFlowInformationAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration