Quarterly report pursuant to Section 13 or 15(d)

Note 2 - Summary of Significant Accounting Policies (Details Textual)

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Note 2 - Summary of Significant Accounting Policies (Details Textual)
$ in Thousands
3 Months Ended
Jan. 31, 2020
USD ($)
Oct. 31, 2019
USD ($)
Accounts Receivable, Allowance for Credit Loss, Ending Balance $ 600 $ 600
Inventory Valuation Reserves, Ending Balance 0 $ 0
Impairment of Long-Lived Assets Held-for-use $ 0  
Supplier Concentration Risk [Member] | Cost of Goods and Service Benchmark [Member]    
Number of Vendors 2 2