Business Combinations (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Aug. 04, 2011
Nokia Siemens Networks [Member]
Allocation of the purchase price to the estimated fair value of the assets acquired and liabilities assumed at the acquisition date
Other receivables/Accounts receivable	$ 395
Inventory	22,278
Property, plant and equipment	5,035
Accounts payable	(5,194)
Unearned revenue	(13,579)
Accrued expenses	(1,931)
Accrued wages and benefits	(2,251)
Deferred tax assets (liabilities), net	(788)
Non-current unearned revenue	(18,059)
Net assets acquired (liabilities assumed)	(14,094)
Gain on bargain purchase of a business, net of tax	(1,753)
Total purchase price	(7,496)
Nokia Siemens Networks [Member] | Customer relationships [Member]
Allocation of the purchase price to the estimated fair value of the assets acquired and liabilities assumed at the acquisition date
Intangible assets	5,162
Nokia Siemens Networks [Member] | Developed Technology [Member]
Allocation of the purchase price to the estimated fair value of the assets acquired and liabilities assumed at the acquisition date
Intangible assets	3,176
Nokia Siemens Networks [Member] | Other [Member]
Allocation of the purchase price to the estimated fair value of the assets acquired and liabilities assumed at the acquisition date
Intangible assets	13
Bluesocket [Member]
Allocation of the purchase price to the estimated fair value of the assets acquired and liabilities assumed at the acquisition date
Cash		1,027
Other receivables/Accounts receivable		298
Inventory		792
Prepaid expenses		357
Property, plant and equipment		173
Accounts payable		(441)
Unearned revenue		(600)
Accrued expenses		(332)
Deferred tax assets (liabilities), net		12,962
Net assets acquired (liabilities assumed)		14,236
Goodwill	3,500	3,492
Total purchase price		23,688
Bluesocket [Member] | Customer relationships [Member]
Allocation of the purchase price to the estimated fair value of the assets acquired and liabilities assumed at the acquisition date
Intangible assets		1,530
Bluesocket [Member] | Developed Technology [Member]
Allocation of the purchase price to the estimated fair value of the assets acquired and liabilities assumed at the acquisition date
Intangible assets		3,230
Bluesocket [Member] | Intellectual property [Member]
Allocation of the purchase price to the estimated fair value of the assets acquired and liabilities assumed at the acquisition date
Intangible assets		930
Bluesocket [Member] | Trade names [Member]
Allocation of the purchase price to the estimated fair value of the assets acquired and liabilities assumed at the acquisition date
Intangible assets		$ 270