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Long-Term Debt and Lines of Credit - Lines of Credit Narrative (Detail) | 0 Months Ended |  |  | 3 Months Ended |  | 3 Months Ended |  | 3 Months Ended |
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Aug. 13, 2013 Subsequent Event [Member] Revolving Credit Facility [Member] New Credit Agreement [Member] USD ($) | Jul. 28, 2013 United States [Member] Amended and Restated Credit Agreement [Member] USD ($) | Apr. 28, 2013 United States [Member] Amended and Restated Credit Agreement [Member] USD ($) | Jul. 28, 2013 United States [Member] Revolving Credit Facility [Member] Amended and Restated Credit Agreement [Member] USD ($) | Apr. 28, 2013 United States [Member] Revolving Credit Facility [Member] Amended and Restated Credit Agreement [Member] USD ($) | Jul. 28, 2013 China [Member] Revolving credit agreement [Member] USD ($) | Jul. 28, 2013 China [Member] Revolving credit agreement [Member] CNY | Apr. 28, 2013 China [Member] Revolving credit agreement [Member] USD ($) | Jul. 28, 2013 Poland [Member] Revolving credit agreement [Member] USD ($) | Jul. 28, 2013 Poland [Member] Revolving credit agreement [Member] PLN | Apr. 28, 2013 Poland [Member] Revolving credit agreement [Member] USD ($) | Apr. 28, 2013 Poland [Member] Revolving credit agreement [Member] PLN
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity | $ 10,000,000 |  |  | $ 7,600,000 |  | $ 6,500,000 | 40,000,000 |  | $ 2,100,000 | 6,800,000 |  |
Applicable interest rate at end of period |  |  |  | 1.79% |  |  |  |  | 4.625% | 4.625% |  |
Interest rate description | Interest is charged at a rate equal to the one-month LIBOR rate plus a spread based on our ratio of debt to EBITDA as defined in the agreement. |  |  | This agreement provided for a pricing matrix to determine the interest rate payable on loans made under the agreement |  | This agreement has an interest rate determined by the Chinese government | This agreement has an interest rate determined by the Chinese government |  | This agreement bears interest at WIBOR (Warsaw Interbank Offered Rate) plus 2% | This agreement bears interest at WIBOR (Warsaw Interbank Offered Rate) plus 2% |  |
Letter of credit, outstanding amount |  | 195,000 | 195,000 |  |  |  |  |  |  |  |  |
Outstanding amount |  |  |  | $ 0 | $ 0 | $ 0 | 0 | $ 0 | $ 560,000 | 1,800,000 | $ 561,000 | 1,800,000
Expiration date | Aug. 31, 2015 |  |  |  |  | Jun. 08, 2014 | Jun. 08, 2014 |  | Aug. 31, 2015 | Aug. 31, 2015 |  |
Reference rate on which the interest rate is based | One-month LIBOR Rate |  |  |  |  |  |  |  | Warsaw Interbank Offered Rate | Warsaw Interbank Offered Rate |  |
Percent added to reference rate in effect from time to time to set the interest rate |  |  |  |  |  |  |  |  | 2.00% | 2.00% |  |

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- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
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- Definition The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR. + References No definition available. + Details
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- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
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- Definition Amount borrowed under the credit facility as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition Date the credit facility terminates, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition The effective interest rate at the end of the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition Description of the interest rate for the amounts borrowed under the credit facility, including the terms and the method for determining the interest rate (for example, fixed or variable, LIBOR plus a percentage, increasing rate, timing of interest rate resets, remarketing provisions). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- 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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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