Number of customers contributing to concentration risk during the period.

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The percentage of cash and cash equivalents investments held within the entity's investment portfolio.

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No definition available.

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Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.

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- Definition

A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-Name Accounting Standards Codification

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Contingent Stock Agreement

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-Publisher FASB

-Name Accounting Standards Codification

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

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Amount of expenses related to the generation of investment income.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

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-Section S99

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Significant accounting policies (Details) shares in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015 USD ($) shares	Jun. 30, 2014 shares	Jun. 30, 2015 USD ($) item shares	Jun. 30, 2014 USD ($) item shares
Cash, cash equivalents and short-term investments:
Cash and cash equivalent investment portfolio, percentage	20.00%		20.00%
Management fees			$ 16,000	$ 12,000
Accounts receivable:
Accounts receivable, net	$ 24,000		24,000
Allowance for uncollectable accounts	$ 1,600		$ 1,600
Income (loss) per share:
Shares not included in the computation of EPS \| shares	6.2	5.3	6.2	5.3
Accounts receivable [Member] \| Customer concentration [Member]
Concentration Risk [Line Items]
Number of customers \| item			2
Net sales [Member] \| European-based concentration [Member]
Concentration Risk [Line Items]
Number of customers \| item			3	2
Net sales [Member] \| European-based concentration [Member] \| Customer One [Member]
Concentration Risk [Line Items]
Risk percentage			58.00%	37.00%
Net sales [Member] \| European-based concentration [Member] \| Customer Two [Member]
Concentration Risk [Line Items]
Risk percentage			28.00%	63.00%
Net sales [Member] \| European-based concentration [Member] \| Customer Three [Member]
Concentration Risk [Line Items]
Risk percentage			14.00%