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Accrued Warranty (Warranty obligations) (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Product Warranty Liability [Line Items]    
Balance $ 1,381 $ 806
Accruals for warranties issued during the period 958 519
Warranty costs incurred during the period (574) (326)
Balance $ 1,765 $ 999