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Note 5 - Customer and Supplier Concentrations (Detail) - Suppliers Comprising 10 Percent or More of the Company’s Gross Accounts Receivable (USD $)
In Thousands, unless otherwise specified |
Apr. 30, 2013
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Jan. 31, 2013
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|---|---|---|
| Total gross accounts receivable due from suppliers (in Dollars) | $ 1,111 | $ 1,156 |
| Total gross accounts receivable due from suppliers | 100.00% | 100.00% |
| Balance (in Dollars) | 1,073 | 1,130 |
| Percentage | 97.00% | 98.00% |
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Power Systems Technologies, Ltd. [Member]
|
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| Balance (in Dollars) | 951 | 1,008 |
| Percentage | 86.00% | 87.00% |
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Zheng Ge Electrical Company Ltd [Member]
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| Balance (in Dollars) | $ 122 | $ 122 |
| Percentage | 11.00% | 11.00% |