Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies (Details)

v2.4.0.6
Commitments and Contingencies (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended 1 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Mar. 31, 2012
Sep. 30, 2012
Inventory
Apr. 30, 2012
Inventory
CPS
Lease Commitments              
Renewal option period     5 years        
Deferred rent $ 0.2   $ 0.2   $ 0.3    
Rent expense 0.5 0.5 1.1 1.1      
Commitments and Contingencies              
Commitment to purchase           31.2  
Remaining TA100 microturbine inventory purchased             $ 2.3