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Significant Customers
6 Months Ended
Jun. 30, 2011
Significant Customers [Abstract]  
Significant Customers
6.         SIGNIFICANT CUSTOMERS

Approximately 98% and 99% of revenues for the three-month periods ended June 30, 2011 and 2010, respectively, are generated from either the U.S. Government or contractors to the U.S. Government.  Approximately 96% and 100% of revenues for the six-month periods ended June 30, 2011 and 2010, respectively, are generated from either the U.S. Government or contractors to the U.S. Government.