Balance Sheet Details (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Schedule of inventories
Raw materials and purchased parts	$ 24,157us-gaap_InventoryRawMaterials	$ 23,042us-gaap_InventoryRawMaterials
Work-in-process	2,831us-gaap_InventoryWorkInProcess	2,522us-gaap_InventoryWorkInProcess
Finished goods	20,017us-gaap_InventoryFinishedGoods	23,311us-gaap_InventoryFinishedGoods
Reserves	(3,767)us-gaap_InventoryValuationReserves	(4,019)us-gaap_InventoryValuationReserves
Total inventories	$ 43,238us-gaap_InventoryNet	$ 44,856us-gaap_InventoryNet

Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

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