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 |
| X | ||||||||||
- Definition Represents number of significant vendors. No definition available.
|
| X | ||||||||||
- Definition Amount of allowance for credit loss on accounts receivable. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount of valuation reserve for inventory. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|