Business Combinations (Details 2) (USD $) In Thousands, unless otherwise specified	Apr. 16, 2010 Assets of IKOR Acquisition Corporation [Member]	Apr. 30, 2012 Fox Enterprises [Member]
Business Acquisition, Purchase Price Allocation [Abstract]
Business Acquisition, Purchase Price Allocation, Current Assets, Cash and Cash Equivalents		$ 1,080
Business Acquisition, Purchase Price Allocation, Current Assets, Receivables	836	4,053
Business Acquisition, Purchase Price Allocation, Current Assets, Inventory	1,136	2,600
Business Acquisition, Purchase Price Allocation, Current Assets, Prepaid Expense and Other Assets	63	363
Business Acquisition, Purchase Price Allocation, Property, Plant and Equipment	277	656
Business Acquisition, Purchase Price Allocation, Other Noncurrent Assets		627
Business Acquisition, Purchase Price Allocation, Current Liabilities	(1,226)	(3,765)
Business Acquisition, Purchase Price Allocation, Other Noncurrent Liabilities		(1,516)
Business Acquisition, Purchase Price Allocation, Deferred Tax Liabilities, Noncurrent		(3,577)
Business Acquisition, Purchase Price Allocation, Amortizable Intangible Assets	5,711	12,300
Goodwill	946	16,100
Total purchase price	7,743	28,921
Finite-Lived Intangible Assets, Gross [Abstract]
Business Acquisition, Purchase Price Allocation, Amortizable Intangible Assets, Existing Technology	5,224	7,900
Finite-Lived Customer Relationships, Gross	443	2,000
Finite-Lived Trade Names, Gross		1,500
Other Finite-Lived Intangible Assets, Gross		900
Acquired Finite-lived Intangible Asset, Amount	44
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangibles	$ 5,711	$ 12,300