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Lines of Credit - Narrative (Detail) |  |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Aug. 19, 2022 USD ($) | Jun. 24, 2022 USD ($) | Jul. 31, 2022 USD ($) | Aug. 01, 2021 USD ($) | May 01, 2022 USD ($) | Jul. 31, 2022 CNY (¥)
Revolving Credit Facility [Member] | United States [Member] |  |  |  |  |  |
Line Of Credit Facility [Line Items] |  |  |  |  |  |
Maximum borrowing capacity |  | $ 40,000,000 |  |  | $ 30,000,000 |
Expiration date |  |  |  |  | Aug. 15, 2022 |
Maximum amount of letters of credit |  | $ 1,000,000 |  |  | $ 1,000,000 |
Expiration month year |  | 2025-06 |  |  |  |
Minimum tangible net worth |  | $ 100,000,000 |  |  |  |
Percentage of minimum annual net income |  | 50.00% |  |  |  |
EBITDA to net interest expense ratio |  | 3.0 |  |  |  |
Minimum access to liquidity amount |  | $ 15,000,000 |  |  |  |
Applicable interest rate at end of period |  |  | 2.88% | 1.69% | 2.40% | 2.88%
Interest rate description |  |  | Interest was charged under the Amended Agreement at a rate calculated using the Applicable Margin over SOFR based on the ratio of the company’s consolidated debt to consolidated EBITDA |  | Interest was charged at a rate as a variable spread over LIBOR based on a ratio of debt to EBITDA |
Reference rate on which the interest rate is based |  |  | SOFR |  | LIBOR |
Letters of credit, outstanding amount |  |  | $ 275,000 | $ 275,000 | $ 275,000 |
Outstanding amount |  |  | 0 | 0 | 0 |
Interest paid during the year |  |  | 8,000 | 0 |  |
Revolving Credit Facility [Member] | United States [Member] | Letters of Credit [Member] |  |  |  |  |  |
Line Of Credit Facility [Line Items] |  |  |  |  |  |
Remaining letters of credit |  |  | 725,000 |  |  |
Revolving Credit Facility [Member] | United States [Member] | Subsequent Event [Member] |  |  |  |  |  |
Line Of Credit Facility [Line Items] |  |  |  |  |  |
Minimum access to liquidity amount | $ 15,000,000 |  |  |  |  |
Revolving Credit Facility [Member] | United States [Member] | Secured Overnight Financing Rate (SOFR) [Member] |  |  |  |  |  |
Line Of Credit Facility [Line Items] |  |  |  |  |  |
Debt instrument, basis spread on interest rate |  | 1.35% |  |  |  |
Revolving Credit Facility [Member] | United States [Member] | Minimum [Member] | Secured Overnight Financing Rate (SOFR) [Member] |  |  |  |  |  |
Line Of Credit Facility [Line Items] |  |  |  |  |  |
Debt instrument, basis spread on interest rate |  | 1.35% |  |  |  |
Revolving Credit Facility [Member] | United States [Member] | Maximum [Member] | Secured Overnight Financing Rate (SOFR) [Member] |  |  |  |  |  |
Line Of Credit Facility [Line Items] |  |  |  |  |  |
Debt instrument, basis spread on interest rate |  | 2.50% |  |  |  |
Revolving credit agreements [Member] | China [Member] | Chinese Yuan Renminbi [Member] |  |  |  |  |  |
Line Of Credit Facility [Line Items] |  |  |  |  |  |
Maximum borrowing capacity |  |  | $ 5,900,000 |  |  | ¥ 40,000,000
Expiration date |  |  | Nov. 15, 2022 |  |  |
Interest rate description |  |  | Interest charged under this agreement is based on an interest rate determined by the Chinese government at the time of borrowing |  |  |
Outstanding amount |  |  | $ 0 | 0 | 0 |
Revolving credit agreements [Member] | China [Member] | United States Dollar [Member] |  |  |  |  |  |
Line Of Credit Facility [Line Items] |  |  |  |  |  |
Maximum borrowing capacity |  |  | $ 2,000,000 |  |  |
Expiration date |  |  | Aug. 30, 2022 |  |  |
Interest rate description |  |  | Interest charged under this agreement is based on an interest rate determined by the Chinese government at the time of borrowing. |  |  |
Outstanding amount |  |  | $ 0 | $ 0 | $ 0 |

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- Definition Minimum access to liquidity amount. + References No definition available. + Details
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- Definition Amount of cash paid for interest, including, but not limited to, capitalized interest and payment to settle zero-coupon bond attributable to accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount; classified as operating and investing activities. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=126999549&loc=d3e4297-108586 + Details
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- Definition Date the credit facility terminates, in YYYY-MM-DD format. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Description of interest rate for borrowing under credit facility. Includes, but is not limited to, terms and method for determining interest rate. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition The carrying value as of the balance sheet date of the noncurrent portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 45 -Paragraph 14 -URI https://asc.fasb.org/extlink&oid=99376301&loc=d3e1336-112600 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 45 -Paragraph 13 -URI https://asc.fasb.org/extlink&oid=99376301&loc=d3e1314-112600 + Details
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