Note 4 - Supplier Concentration - Supplier Concentration Risk Accounts Receivable and Payable (Details) - USD ($) $ in Thousands	12 Months Ended
Jan. 31, 2017	Jan. 31, 2016
Accounts receivable		$ 122
Accounts payable	39	883
Supplier Concentration Risk [Member] \| Account Receivable from Suppliers [Member]
Accounts receivable		$ 122
Concentration percentage, accounts receivables	0.00%	100.00%
Concentration percentage, accounts payable	0.00%	100.00%
Supplier Concentration Risk [Member] \| Account Receivable from Suppliers [Member] \| Zheng Ge Electrical Company Ltd [Member]
Accounts receivable		$ 122
Concentration percentage, accounts receivables	0.00%	100.00%
Concentration percentage, accounts payable	0.00%	100.00%
Supplier Concentration Risk [Member] \| Accounts Payable [Member]
Concentration percentage, accounts receivables	100.00%	100.00%
Accounts payable	$ 39	$ 883
Concentration percentage, accounts payable	100.00%	100.00%
Supplier Concentration Risk [Member] \| Accounts Payable [Member] \| Pillsbury Winthrop Shaw Pittman L L P [Member]
Concentration percentage, accounts receivables	0.00%	49.00%
Accounts payable		$ 432
Concentration percentage, accounts payable	0.00%	49.00%

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.

+ 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(3))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: 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(4))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=84177426&loc=d3e6351-108592

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13531-108611

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=84177426&loc=d3e6404-108592

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13537-108611

+ Details

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- Details

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- Details

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- Details

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- Details

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