XML 22 R43.htm IDEA: XBRL DOCUMENT v2.4.0.8
Fair Value Measurement (Details) (USD $)
In Thousands, unless otherwise specified
Jan. 25, 2014
Apr. 27, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Available-for-sale securities: $ 25,290 $ 24,052
Certificates of deposit
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Available-for-sale securities: 7,632 4,677
U.S. Government securities
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Available-for-sale securities: 3,001 5,018
U.S. Government sponsored entities
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Available-for-sale securities: 4,750 4,752
Municipal obligations
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Available-for-sale securities: 9,907 9,605
Recurring Basis | Level 1
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Cash and cash equivalents 55,914 40,628
Restricted cash 26 48
Derivatives - currency forward contracts 0 0
Assets, net 58,941 45,694
Recurring Basis | Level 1 | Certificates of deposit
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Available-for-sale securities: 0 0
Recurring Basis | Level 1 | U.S. Government securities
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Available-for-sale securities: 3,001 5,018
Recurring Basis | Level 1 | U.S. Government sponsored entities
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Available-for-sale securities: 0 0
Recurring Basis | Level 1 | Municipal obligations
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Available-for-sale securities: 0 0
Recurring Basis | Level 2
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Cash and cash equivalents 0 0
Restricted cash 0 0
Derivatives - currency forward contracts 201 7
Assets, net 22,490 19,041
Recurring Basis | Level 2 | Certificates of deposit
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Available-for-sale securities: 7,632 4,677
Recurring Basis | Level 2 | U.S. Government securities
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Available-for-sale securities: 0 0
Recurring Basis | Level 2 | U.S. Government sponsored entities
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Available-for-sale securities: 4,750 4,752
Recurring Basis | Level 2 | Municipal obligations
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Available-for-sale securities: 9,907 9,605
Recurring Basis | Total
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Cash and cash equivalents 55,914 40,628
Restricted cash 26 48
Derivatives - currency forward contracts 201 7
Assets, net 81,431 64,735
Recurring Basis | Total | Certificates of deposit
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Available-for-sale securities: 7,632 4,677
Recurring Basis | Total | U.S. Government securities
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Available-for-sale securities: 3,001 5,018
Recurring Basis | Total | U.S. Government sponsored entities
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Available-for-sale securities: 4,750 4,752
Recurring Basis | Total | Municipal obligations
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Available-for-sale securities: $ 9,907 $ 9,605