Summary of Significant Accounting Policies - Additional Information (Detail)
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3 Months Ended |
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Apr. 30, 2019
USD ($)
Customer
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Jan. 31, 2019
Customer
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Apr. 30, 2018
Customer
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Feb. 01, 2019
USD ($)
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| Significant Accounting Policies [Line Items] |
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| Accumulated goodwill impairment charges |
$ 54,800,000
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| Impairment costs |
0
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| Operating lease right-of-use assets |
1,964,000
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$ 1,700,000
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| Operating lease liability |
$ 1,964,000
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$ 1,700,000
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| Hardware and Software Maintenance [Member] |
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| Significant Accounting Policies [Line Items] |
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| Commissions and special incentive payments amortized period |
5 years
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| Maximum [Member] |
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| Significant Accounting Policies [Line Items] |
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| Contractual customer payment terms for goods or service. |
1 year
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| Credit Concentration Risk [Member] | Accounts Receivable [Member] |
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| Significant Accounting Policies [Line Items] |
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| Number of customers accounted | Customer |
2
|
2
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| Credit Concentration Risk [Member] | Accounts Receivable [Member] | Customer One [Member] |
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| Significant Accounting Policies [Line Items] |
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| Concentration risk percentage |
25.00%
|
44.00%
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| Credit Concentration Risk [Member] | Accounts Receivable [Member] | Customer Two [Member] |
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| Significant Accounting Policies [Line Items] |
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| Concentration risk percentage |
15.00%
|
15.00%
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| Customer Concentration Risk [Member] | Total Revenue [Member] |
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| Significant Accounting Policies [Line Items] |
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| Number of customers accounted | Customer |
1
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|
2
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| Concentration risk percentage |
17.00%
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| Customer Concentration Risk [Member] | Total Revenue [Member] | Customer One [Member] |
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| Significant Accounting Policies [Line Items] |
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| Concentration risk percentage |
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19.00%
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| Customer Concentration Risk [Member] | Total Revenue [Member] | Customer Two [Member] |
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| Significant Accounting Policies [Line Items] |
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| Concentration risk percentage |
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10.00%
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