Quarterly report pursuant to Section 13 or 15(d)

Inventories (Details)

Inventories (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Mar. 31, 2014
Components of inventories    
Raw materials $ 7,518us-gaap_InventoryRawMaterialsNetOfReserves $ 9,076us-gaap_InventoryRawMaterialsNetOfReserves
Finished goods and sub-assemblies 15,391us-gaap_InventoryFinishedGoodsNetOfReserves 14,980us-gaap_InventoryFinishedGoodsNetOfReserves
Total inventories $ 22,909us-gaap_InventoryNet $ 24,056us-gaap_InventoryNet [1]
[1] Certain amounts have been adjusted to reflect measurement period adjustments related to the CSI acquisition.