Contractual customer payment terms for goods or service.

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- Definition

Number Of Major Customers

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- Definition

Significant Accounting Policies [Line Items]

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No definition available.

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- Definition

Amount of amortization expense for asset recognized from cost incurred to obtain or fulfill contract with customer.

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- Definition

Amount of impairment loss for asset recognized from cost incurred to obtain or fulfill contract with customer.

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- Definition

Amount, after accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer.

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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- Definition

Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Significant Accounting Policies - Additional Information (Detail)	3 Months Ended		6 Months Ended			12 Months Ended
	Jul. 31, 2020 USD ($) Customer	Jul. 31, 2019 Customer	Jul. 31, 2021 USD ($)	Jul. 31, 2020 USD ($) Customer	Jul. 31, 2019 USD ($) Customer	Jan. 31, 2020 USD ($) Customer
Significant Accounting Policies [Line Items]
Accumulated goodwill impairment charges			$ 54,800,000
Impairment costs				$ 0		$ 0
Deferred capitalized commission costs	$ 862,000			862,000		$ 958,000
Amortization expense				$ 218,000	$ 59,000
Maximum [Member]
Significant Accounting Policies [Line Items]
Contractual customer payment terms for goods or service.				1 year
COVID-19 [Member]
Significant Accounting Policies [Line Items]
Goodwill impairment			$ 0
Customer Concentration Risk [Member] \| Total Revenue [Member]
Significant Accounting Policies [Line Items]
Number of customers accounted \| Customer	2	2		1	1
Customer Concentration Risk [Member] \| Total Revenue [Member] \| Customer One [Member]
Significant Accounting Policies [Line Items]
Concentration risk percentage	22.00%	20.00%		18.00%	14.00%
Customer Concentration Risk [Member] \| Total Revenue [Member] \| Customer Two [Member]
Significant Accounting Policies [Line Items]
Concentration risk percentage	11.00%	10.00%
Credit Concentration Risk [Member] \| Accounts Receivable [Member]
Significant Accounting Policies [Line Items]
Number of customers accounted \| Customer				2		2
Credit Concentration Risk [Member] \| Accounts Receivable [Member] \| Customer One [Member]
Significant Accounting Policies [Line Items]
Concentration risk percentage				29.00%		16.00%
Credit Concentration Risk [Member] \| Accounts Receivable [Member] \| Customer Two [Member]
Significant Accounting Policies [Line Items]
Concentration risk percentage				17.00%		10.00%