Note 7 - Accrued Liabilities (Detail) (USD $) In Millions, unless otherwise specified	Apr. 30, 2013	Jan. 31, 2013
Zheng Ge Electrical Company Ltd [Member] \| Uninvoiced Materials and Services (Member)
Accounts Payable and Other Accrued Liabilities	$ 1.5	$ 1.1
Total Uninvoiced Materials and Services (Member)
Accounts Payable and Other Accrued Liabilities	$ 1.8	$ 1.3

Sum of the carrying values as of the balance sheet date of liabilities incurred and payable to vendors for goods and services received, and other costs not separately disclosed in the balance sheet that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered.

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant