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Income Taxes (Details 2) - USD ($)
$ in Thousands
Jul. 01, 2018
Jul. 02, 2017
Income Tax Disclosure [Abstract]    
Unrecognized pension and postretirement benefit plan liabilities $ 6,887 $ 11,191
Accrued warranty 517 925
Payroll-related accruals 1,959 2,605
Stock-based compensation 727 1,488
Inventory reserve 799 1,249
Environmental reserve 303 484
Repair and maintenance supply parts reserve 212 333
Allowance for doubtful accounts 118 185
NOL/credit carry-forwards 248 1,669
Postretirement obligations (375) (405)
Accumulated depreciation (4,902) (6,034)
Accrued pension obligations (9,235) (14,483)
Joint ventures 814 808
Other 967 241
Deferred tax liabilities, net $ (961)  
Deferred tax assets, net   $ 256