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Property and Equipment - Narrative (Details) - USD ($) | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended | 61 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | ---
Jul. 31, 2018 | Oct. 31, 2020 | Jan. 31, 2020 | Oct. 31, 2019 | Oct. 31, 2020 | Oct. 31, 2019 | Nov. 30, 2020 | Nov. 30, 2019 | Apr. 30, 2020 | Jul. 31, 2019
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |
Depreciation |  | $ 254,000 |  | $ 162,000 | $ 478,000 | $ 307,000 |  |  |  |
Assets under finance lease |  | 343,000 |  |  | 343,000 |  |  |  | $ 366,000 |
Finance lease costs | $ 266,000 |  |  |  |  |  |  | $ 149,000 |  |
Future minimum lease payments remaining |  |  | $ 2,000 |  | 115,000 | 14,000 |  |  |  |
Finance leases monthly payments | $ 11,000 |  |  |  |  |  |  |  |  |
Finance lease, liability |  |  |  |  |  |  |  |  |  | $ 0
Finance lease, amortization |  | 53,100 |  | 0 | 106,000 | 0 |  |  |  |
Subsequent Event |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |
Finance lease costs |  |  |  |  |  |  | $ 231,000 |  |  |
Future minimum lease payments remaining |  |  |  |  |  |  | 19,000 |  |  |
Finance leases monthly payments |  |  |  |  |  |  | $ 19,000 |  |  |
Present value of minimum future obligations interest rate |  |  |  |  |  |  | 4.75% |  |  |
Finance Leased Assets |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |
Depreciation |  | $ 53,000 |  | $ 16,000 | $ 106,000 | $ 53,000 |  |  |  |
Minimum |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |
Useful lives |  |  |  |  | 3 years |  |  |  |  |
Maximum |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |
Useful lives |  |  |  |  | 9 years |  |  |  |  |

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- Definition The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 + Details
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