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Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands | Oct. 31, 2020 | Jan. 31, 2020 | Apr. 30, 2019
--- | --- | --- | ---
Assets |  |  |
Operating lease right-of-use assets | $ 1,363 | $ 2,300 | $ 3,000
Liabilities |  |  |
Operating lease liabilities | 1,363 | 2,300 | 3,000
Current liabilities | 280 | 1,339 |
Non-current liabilities | 1,083 | 961 |
Total Operating lease liabilities | $ 1,363 | $ 2,300 | $ 3,000
Weighted average remaining lease term (years) |  |  |
Operating leases | 1 year 3 months 7 days | 1 year 9 months 3 days |
Weighted average discount rate: |  |  |
Operating leases | 9.27% | 9.27% |

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- Definition Present value of lessee's discounted obligation for lease payments from operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977 + Details
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