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Credit Agreement and Long- Term Debt - Additional Information (Detail) - USD ($) |  | 12 Months Ended
--- | --- | ---
Mar. 24, 2021 | Jan. 31, 2022 | Jan. 31, 2021 | Jan. 31, 2020
Debt Instrument [Line Items] |  |  |  |
Interest expense on long term debt |  | $ 677,000 | $ 955,000 | $ 682,000
Principal payment terms |  | The Amended Credit Agreement requires that the term loan be paid in quarterly installments on the last day of each of our fiscal quarters with the final payment due on September 30, 2025. |  |
Interest Expense [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest expense on long term debt |  | $ 300,000 | $ 500,000 | $ 400,000
Term Loan [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Longterm Debt instrument, maturity date |  | Sep. 30, 2025 |  |
Revolving Credit Facility [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Variable interest rate |  | 0.50 |  |
LIBOR [Member] | Revolving Credit Facility [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate |  | 1.00% |  |
Federal Funds Effective Swap Rate [Member] | Revolving Credit Facility [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate |  | 0.50% |  |
Minimum [Member] | Revolving Credit Facility [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Commitment fee rate |  | 0.15% |  |
Percentage added to variable rate |  | 0.60% |  |
Minimum [Member] | LIBOR [Member] | Revolving Credit Facility [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate |  | 1.60% |  |
Maximum [Member] | Revolving Credit Facility [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Commitment fee rate |  | 0.30% |  |
Percentage added to variable rate |  | 1.30% |  |
Maximum [Member] | LIBOR [Member] | Revolving Credit Facility [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate |  | 2.30% |  |
Bank of America, N.A. [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Term loans repaid | $ 2,600,000 |  |  |
Bank of America, N.A. [Member] | Term Loan [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Principal amount of debt |  | $ 10,000,000.0 |  |
Term loan, principal amount |  | 10,000,000.0 |  |
Bank of America, N.A. [Member] | Revolving Credit Facility [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maximum borrowing capacity |  | $ 22,500,000 |  |
Revolving line of credit, Outstanding loan amount weighted average interest rate |  | 4.10% | 3.41% |
Commitement fees on the undrawn portion of the credit facility |  | $ 50,000 | $ 8,300 |
Line of credit remaining borrowing capacity |  | 22,500,000 |  |
Bank of America, N.A. [Member] | Revolving Credit Facility [Member] | Other Expense [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest Expense, Debt |  | 4,000 | $ 188,000 |
Bank of America, N.A. [Member] | Maximum [Member] | Term Loan [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Principal amount of debt |  | 10,000,000.0 |  |
Term loan, principal amount |  | $ 10,000,000.0 |  |

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