Rendering

Component: (Network and Table)
Network
100520 - Disclosure - Product Warranty Liability - Reconciliation of the Changes in Product Warranty Liability (Detail)
(http://www.graham-mfg.com/20160331/taxonomy/role/DisclosureProductWarrantyLiabilityReconciliationOfChangesInProductWarrantyLiabilityDetail)
Table(Implied)
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0000716314 (http://www.sec.gov/CIK)
Guarantees [Abstract]Period [Axis]
2015-04-01 - 2016-03-31
2014-04-01 - 2015-03-31
Guarantees [Abstract]
 
 
Balance at beginning of year
653,000  
308,000  
Expense for product warranties
336,000  
930,000  
Product warranty claims paid
(303,000) 
(585,000) 
Balance at end of year
686,000  
 
653,000