Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands	Apr. 30, 2021	Jan. 31, 2021
Assets
Operating lease right-of-use assets	$ 1,138	$ 1,471
Liabilities
Operating lease liabilities	1,138	1,471
Current liabilities	665	1,008
Non-current liabilities	473	463
Total Operating lease liabilities	$ 1,138	$ 1,471
Weighted average remaining lease term (years)
Operating leases	1 year 1 month 9 days	1 year 1 month 2 days
Weighted average discount rate:
Operating leases	9.36%	10.00%

Leases, Weighted Average Discount Rate [Abstract]

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Weighted Average Remaining Lease Term [Abstract]

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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)
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Present value of lessee's discounted obligation for lease payments from operating lease, classified as current.

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Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent.

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Amount of lessee's right to use underlying asset under operating lease.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
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Weighted average discount rate for operating lease calculated at point in time.

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
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Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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