Note 10 - Foreign Currency Translation	9 Months Ended
Jun. 30, 2011
Foreign Currency Disclosure [Text Block]	10. FOREIGN CURRENCY TRANSLATION The Company’s Hungarian subsidiary, Zoltek Zrt. has a functional currency of the HUF. As a result, the Company is exposed to foreign currency risks related to this investment. The consolidated balance sheet of Zoltek Zrt. was translated from Hungarian Forints to US dollars, at the exchange rate in effect at the applicable balance sheet date, while its consolidated statements of operations were translated using the average exchange rates in effect for the periods presented. The related translation adjustments are reported as other comprehensive income (loss) within shareholders’ equity. Gains and losses from foreign currency transactions of Zoltek Zrt. are included in the results of operations as other income (expense). The HUF strengthened by 9.8% against the US dollar during the first nine months of fiscal 2011. This currency fluctuation caused a decrease of $15.5 million in our accumulated other comprehensive loss for the nine months ended June 30, 2011. The functional currency of Zoltek de Mexico is the US dollar.

Note 10 - Foreign Currency Translation

9 Months Ended

Jun. 30, 2011

Foreign Currency Disclosure [Text Block]

10. FOREIGN CURRENCY TRANSLATION

The Company’s Hungarian subsidiary, Zoltek Zrt. has a functional currency of the HUF. As a result, the Company is exposed to foreign currency risks related to this investment. The consolidated balance sheet of Zoltek Zrt. was translated from Hungarian Forints to US dollars, at the exchange rate in effect at the applicable balance sheet date, while its consolidated statements of operations were translated using the average exchange rates in effect for the periods presented. The related translation adjustments are reported as other comprehensive income (loss) within shareholders’ equity. Gains and losses from foreign currency transactions of Zoltek Zrt. are included in the results of operations as other income (expense). The HUF strengthened by 9.8% against the US dollar during the first nine months of fiscal 2011. This currency fluctuation caused a decrease of $15.5 million in our accumulated other comprehensive loss for the nine months ended June 30, 2011. The functional currency of Zoltek de Mexico is the US dollar.

- Definition

The entire disclosure for foreign currency transactions and translation. This may include description of foreign currency transactions, foreign currency gains and losses, explanation of change in cumulative translation adjustment, description of effect of subsequent foreign currency exchange rate change, cumulative translation adjustment movement, foreign currency translation adjustment by component movement, translation adjustment for net investment hedge movement, adjustment for long-term intercompany transactions, schedule of long-term intercompany balances and any other foreign currency transactions and translation related items.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 30
-Section 45
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=6915805&loc=d3e32211-110900

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 30
-Section 45
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-URI http://asc.fasb.org/extlink&oid=6915805&loc=d3e32157-110900

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=6450222&loc=d3e30857-110895

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 52
-Paragraph 30, 31, 32
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-URI http://asc.fasb.org/extlink&oid=6450189&loc=d3e30690-110894

+ Details