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v2.4.0.6

Note L - Segment Information (Detail) | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011
Number of Reportable Segments | 1 |
Entity-Wide Revenue, Major Customer, Percentage | 10.00% |
North American [Member] |  |
Entity-Wide Revenue, Major Customer, Percentage | 93.00% | 54.00%
Non-North American [Member] |  |
Entity-Wide Revenue, Major Customer, Percentage |  | 46.00%
Africa [Member] |  |
Entity-Wide Revenue, Major Customer, Percentage |  | 43.00%

X
- 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
Name: | us-gaap_EntityWideRevenueMajorCustomerPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | us-gaap_NumberOfReportableSegments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration