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NOTE B - DISCONTINUED OPERATIONS (Details) - Disposal Groups, Including Discontinued Operations - USD ($)
$ in Thousands
Oct. 31, 2017
Apr. 30, 2017
Oct. 31, 2016
Disposal Groups, Including Discontinued Operations [Abstract]      
Cash and cash equivalents $ 794 $ 575 $ 344
Accounts receivable, net of allowance for doubtful accounts 2,525 3,202  
Inventories, net 4,633 3,980  
Prepaid expenses and other 205 408  
Total current assets of discontinued operations 8,157 8,165  
Property, plant and equipment, at cost, net of accumulated depreciation and amortization 547 555  
Investments 15 14  
Deferred taxes – non-current 0 0  
Total non-current assets of discontinued operations 562 569  
Accounts payable – trade 1,004 949  
Accrued liabilities 974 1,300  
Total current liabilities of discontinued operations 1,978 2,249  
Deferred rent and other liabilities 1,387 1,215  
Total non-current liabilities of discontinued operations $ 1,387 $ 1,215