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Lines of Credit and Paycheck Protection Program Loan - Narrative (Detail) |  | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jun. 30, 2020 | Jun. 30, 2020 USD ($) | May 02, 2021 USD ($) | May 03, 2020 USD ($) | Apr. 28, 2019 USD ($) | May 02, 2021 CNY (¥) | Apr. 15, 2020 USD ($)
Line Of Credit Facility [Line Items] |  |  |  |  |  |  |
Outstanding amount |  |  |  | $ 29,750,000 |  |  |
Repayments of debt |  |  | $ 30,772,000 |  | $ 12,000,000 |  |
Paycheck Protection Program (PPP) loan amount |  |  |  | 7,606,000 |  |  |
Interest paid during the year |  |  | 60,000 | $ 124,000 | $ 54,000 |  |
Paycheck Protection Program, CARES Act [Member] |  |  |  |  |  |  |
Line Of Credit Facility [Line Items] |  |  |  |  |  |  |
Paycheck Protection Program (PPP) loan amount |  |  |  |  |  |  | $ 7,600,000
Revolving Credit Facility [Member] | United States [Member] |  |  |  |  |  |  |
Line Of Credit Facility [Line Items] |  |  |  |  |  |  |
Maximum borrowing capacity |  |  | $ 30,000,000 |  |  |  |
Expiration date |  |  | Aug. 15, 2022 |  |  |  |
Maximum amount of letters of credit |  |  | $ 1,000,000 |  |  |  |
Applicable interest rate at end of period |  |  | 1.71% | 1.75% |  | 1.71% |
Interest rate description |  |  | Interest was charged under the Credit Agreement at a rate as a variable spread over LIBOR based on our ratio of debt to EBITDA. |  |  |  |
Reference rate on which the interest rate is based |  |  | LIBOR |  |  |  |
Percentage of common stock in subsidiary pledge as collateral |  |  | 65.00% |  |  |  |
Outstanding amount |  |  | $ 0 | $ 29,800,000 |  |  |
Additional borrowings amount |  |  | 0 |  |  |  |
Repayments of debt |  | $ 29,800,000 |  |  |  |  |
Letters of credit, outstanding amount |  |  | 275,000 | $ 250,000 |  |  |
Revolving Credit Facility [Member] | United States [Member] | Seventh Amendment to Credit Agreement [Member] |  |  |  |  |  |  |
Line Of Credit Facility [Line Items] |  |  |  |  |  |  |
Annual capital expenditures |  |  | 10,000,000 |  |  |  |
Reduced percentage of allowable liens and other indebtedness |  | 5.00% |  |  |  |  |
Revolving Credit Facility [Member] | United States [Member] | Seventh Amendment to Credit Agreement [Member] | Maximum [Member] |  |  |  |  |  |  |
Line Of Credit Facility [Line Items] |  |  |  |  |  |  |
Maximum allowable payment of dividends or stock repurchase |  | $ 10,000,000 |  |  |  |  |
Revolving Credit Facility [Member] | United States [Member] | Seventh Amendment to Credit Agreement [Member] | Price Level I [Member] |  |  |  |  |  |  |
Line Of Credit Facility [Line Items] |  |  |  |  |  |  |
Percentage of pricing matrix increased | 1.60% |  |  |  |  |  |
Revolving Credit Facility [Member] | United States [Member] | Seventh Amendment to Credit Agreement [Member] | Price Level II [Member] |  |  |  |  |  |  |
Line Of Credit Facility [Line Items] |  |  |  |  |  |  |
Percentage of pricing matrix increased | 2.05% |  |  |  |  |  |
Revolving Credit Facility [Member] | United States [Member] | Seventh Amendment to Credit Agreement [Member] | Price Level III [Member] |  |  |  |  |  |  |
Line Of Credit Facility [Line Items] |  |  |  |  |  |  |
Percentage of pricing matrix increased | 2.50% |  |  |  |  |  |
Revolving Credit Facility [Member] | United States [Member] | Seventh Amendment to Credit Agreement [Member] | Price Level IV [Member] |  |  |  |  |  |  |
Line Of Credit Facility [Line Items] |  |  |  |  |  |  |
Percentage of pricing matrix increased | 3.00% |  |  |  |  |  |
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 agreements [Member] | China [Member] | Chinese Yuan Renminbi [Member] |  |  |  |  |  |  |
Line Of Credit Facility [Line Items] |  |  |  |  |  |  |
Maximum borrowing capacity |  |  | $ 6,200,000 |  |  | ¥ 40,000,000 |
Expiration date |  |  | Dec. 01, 2021 |  |  |  |
Applicable interest rate at end of period |  |  |  | 2.41% |  |  |
Interest rate description |  |  | This agreement has an interest rate determined by the Chinese government at the time of borrowing |  |  |  |
Outstanding amount |  |  | $ 0 | $ 1,000,000.0 |  |  |
Additional borrowings amount |  |  | 0 |  |  |  |
Repayments of debt |  | $ 1,000,000.0 |  |  |  |  |
Revolving credit agreements [Member] | China [Member] | United States Dollar [Member] |  |  |  |  |  |  |
Line Of Credit Facility [Line Items] |  |  |  |  |  |  |
Maximum borrowing capacity |  |  | $ 2,000,000 |  |  |  |
Expiration date |  |  | Jul. 07, 2021 |  |  |  |
Interest rate description |  |  | This agreement has an interest rate determined by the Chinese government at the time of borrowing |  |  |  |
Outstanding amount |  |  | $ 0 |  |  |  |

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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 http://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 http://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 http://asc.fasb.org/extlink&oid=99376301&loc=d3e1314-112600 + Details
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