Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies (Details Textual)

v2.4.0.6
Commitments and Contingencies (Details Textual) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 1 Months Ended
Mar. 31, 2012
Mar. 31, 2012
FM-5, XM-5, XM-4 and XM-3 [Member]
Mar. 31, 2012
Thirteen Percent Senior Notes Due Two Thousand Thirteen [Member]
Jul. 31, 2008
Thirteen Percent Senior Notes Due Two Thousand Thirteen [Member]
Apr. 30, 2012
Repayment of Debt [Member]
Thirteen Percent Senior Notes Due Two Thousand Thirteen [Member]
Commitments and Contingencies (Textual) [Abstract]          
Principal balance repaid     $ 34,254   $ 62,729
Interest rate on instrument       13.00%  
Number of days in the event within which certain new products are not shipped by a distributor to a customer 90 days        
Accrual related to contingent performance payments for XM-3 and XM-4 27,812        
Operating performance over design life   15 years      
Additional payments required if XM-4 continues to operate above baseline specifications 10,000        
Period beyond expected operating performance of design life for XM-4 5 years        
Accrual related to contingent performance for FM-5 10,216        
Accrual related to contingent performance for XM-5 $ 21,450        
Operating lease term, minimum (in years) 1 year        
Operating lease term, maximum (in years) 15 years