Note 6 - Segment Reporting (Details)	3 Months Ended	6 Months Ended
Jun. 30, 2012	Jun. 30, 2012
Segment Reporting, Factors Used to Identify Entity's Reportable Segments		Segment information is prepared on the same basis that the Company's management reviews financial information for operational decision making purposes. The Company has two reportable segments, domestic and foreign, based on the geographic location of the customers.
Number of Reportable Segments		2
Segment Reporting Information, Description of Products and Services		Both segments sell radio modem products (requiring an FCC license or license free Ethernet products), related accessories for radio modem products for industrial automation projects, and mobile data computer products.
Industrial Networking Solutions
Entity-Wide Revenue, Major Customer, Percentage	26.00%	18.00%
Domestic
Fraction of total net revenue	88.00%	77.00%
Foreign
Fraction of total net revenue	12.00%	23.00%

The ratio between net revenue from a business segment over entity-wide net revenue.

No definition available.

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- Definition

Description of the types of products and services from which the reportable segment derives its revenue.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 131

-Paragraph 26

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

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- Definition

Percentage of revenue generated from a single external customer that accounts for 10 percent or more of an entity's revenues.

+ References

No definition available.

+ Details

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- Definition

Description of the factors used to identify reportable segments, including the basis of organization (for example, whether management has chosen to organize the enterprise around differences in products and services, geographic areas, regulatory environments, or a combination of factors and whether operating segments have been aggregated to reportable segments).

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 131

-Paragraph 26

-Subparagraph a

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

No definition available.

+ Details

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