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Basis of Presentation - Inventories (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Sep. 30, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]    
Percentage of weighted average cost inventory 50.00%us-gaap_PercentageOfWeightedAverageCostInventory 70.00%us-gaap_PercentageOfWeightedAverageCostInventory
Inventory, Net [Abstract]    
Purchased parts and raw materials $ 14,410us-gaap_InventoryRawMaterialsAndSuppliesNetOfReserves $ 8,797us-gaap_InventoryRawMaterialsAndSuppliesNetOfReserves
Work-in-process 11,111us-gaap_InventoryWorkInProcessNetOfReserves 4,809us-gaap_InventoryWorkInProcessNetOfReserves
Finished goods 7,536us-gaap_InventoryFinishedGoodsNetOfReserves 3,154us-gaap_InventoryFinishedGoodsNetOfReserves
Inventory $ 33,057us-gaap_InventoryNet $ 16,760us-gaap_InventoryNet