Note 9. Intangible Assets (Detail) - Intangible Assets Schedule (USD $)	May 04, 2013	Apr. 28, 2012
Acquired intangible assets:
Gross Value	$ 98,280,000	$ 98,275,000
Cumulative Impairment	(64,415,000)	(61,702,000)
Accumulated Amortization and Effect of Currency Translation	33,865,000	36,573,000
Purchased Intellectual Property - not yet deployed [Member]
Acquired intangible assets:
Gross Value	5,912,000
Accumulated Amortization and Effect of Currency Translation	5,912,000
Purchased IP-Amortizing [Member]
Acquired intangible assets:
Gross Value		6,100,000
Accumulated Amortization and Effect of Currency Translation		6,100,000
Developed Technology Rights [Member]
Acquired intangible assets:
Gross Value	52,025,000	52,025,000
Cumulative Impairment	(36,033,000)	(34,567,000)
Accumulated Amortization and Effect of Currency Translation	15,992,000	17,458,000
Net Value	3,400	3,600
Customer Relationships [Member]
Acquired intangible assets:
Gross Value	20,218,000	20,218,000
Cumulative Impairment	(16,099,000)	(15,782,000)
Accumulated Amortization and Effect of Currency Translation	4,119,000	4,436,000
Net Value	3,400	3,600
Trademarks [Member]
Acquired intangible assets:
Gross Value	2,678,000	2,678,000
Cumulative Impairment	(2,013,000)	(1,983,000)
Accumulated Amortization and Effect of Currency Translation	665,000	695,000
Net Value	5,600	5,900
Noncompete Agreements [Member]
Acquired intangible assets:
Gross Value	1,400,000	1,400,000
Cumulative Impairment	(1,400,000)	(1,400,000)
Purchased IP-Amortizing [Member]
Acquired intangible assets:
Gross Value	16,047,000	15,854,000
Cumulative Impairment	(8,870,000)	(7,970,000)
Accumulated Amortization and Effect of Currency Translation	7,177,000	7,884,000
Net Value	2,200	2,400
Acquired Intangible Assets Subtotal [Member]
Acquired intangible assets:
Gross Value	92,368,000	92,175,000
Cumulative Impairment	(64,415,000)	(61,702,000)
Accumulated Amortization and Effect of Currency Translation	27,953,000	30,473,000
Net Value	$ 3,200	$ 3,400