Note 3 Business Combination (Narratives) (Details) (USD $)	3 Months Ended	6 Months Ended
	Sep. 30, 2013	Sep. 30, 2013 N	Jun. 27, 2013
Business Combinations [Abstract]
Business Acquisition, Name of Acquired Entity		System LSI Division of Samsung Electronics Co., Ltd.
Business Acquisition, Description of Acquired Entity		The acquired product line includes microcontrollers potentially useful in a number of applications, which have to date been principally used in consumer product applications.
Business Combination, Reason for Business Combination		The acquisition is intended to bolster our product portfolio and empower customers to utilize products from across our multiple product lines.
Business Acquisition, Effective Date of Acquisition		Jun. 27, 2013
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net			$ 50,000,000
Business Acquisition, Cost of Acquired Entity, Cash Paid at Closing Date	20,000,000	20,000,000
Business Acquisition, Cost of Acquired Entity, Deferred Payments, Total	30,000,000	30,000,000
Business Acquisition, Cost of Acquired Entity, Deferred Payments, Each Installment	15,000,000	15,000,000
Business Acquisition, Cost of Acquired Entity, Deferred Payments, Number of Installment Payments		2
Business Acquisition, Cost of Acquired Entity, Due Date of First Installment Payment		Jun. 27, 2014
Business Acquisition, Cost of Acquired Entity, Due Date of Second Installment Payment		Dec. 31, 2014
Business Acquisition, Cost of Acquired Entity, Deferred Payments, Description of Variable Rate Basis		six-month LIBOR
Business Acquisition, Cost of Acquired Entity, Deferred Payments, Basis Spread on Variable Rate	3.00%	3.00%
Business Acquisition, Cost of Acquired Entity, Deferred Payments, Interest Rate at Period End	3.42%	3.42%
Business Combination Acquisition Related Costs		403,000
Discount Rate Assumed in Applying Income Approach	19.00%	19.00%
Business Combination ProForma Information Revenue of Acquiree Since Acquisition Date, Actual	7,200,000	7,200,000
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles		(25,000,000)
Goodwill, Purchase Accounting Adjustments		$ 25,000,000