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Note 13 - Commitments and Contingencies (Detail) (USD $)
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0 Months Ended | 1 Months Ended | 12 Months Ended | 12 Months Ended | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Mar. 06, 2012
|
Apr. 26, 2011
|
Jan. 31, 2013
|
Jan. 31, 2012
|
Feb. 29, 2012
|
Sep. 02, 2011
|
Jul. 31, 2011
|
May 13, 2011
|
Jan. 31, 2013
Cancelable (Member)
|
Jan. 31, 2013
Previous Ownership Percentage (Member)
|
Jan. 31, 2013
New Ownership Percentage (Member)
|
Apr. 16, 2013
Additional Damages Sought [Member]
|
Jan. 31, 2013
Legal Fees (Member)
|
Jan. 31, 2013
Possible Liability from Losing Lawsuit (Member)
|
Jul. 24, 2012
product and freight costs (Member)
|
Apr. 30, 2010
Letter of Credit [Member]
|
Jan. 31, 2013
Minimum [Member]
|
Jan. 31, 2013
Maximum [Member]
|
|
| Operating Leases, Future Minimum Payments Due | $ 895,000 | |||||||||||||||||
| Operating Leases, Rent Expense | 300,000 | 300,000 | ||||||||||||||||
| Operating Lease, Reduction of Space Occupied | 67.00% | |||||||||||||||||
| Operating Lease, Early Termination, Abated Base Rent | 60,000 | |||||||||||||||||
| Issue Purchase Orders to Suppliers with Delivery Dates | four | six | ||||||||||||||||
| Forecasts of Material and Finished Goods Requirements Rolling Period | 6 years | |||||||||||||||||
| Recorded Unconditional Purchase Obligation | 1,500,000 | 380,000 | 300,000 | |||||||||||||||
| Sale of Stock, Number of Shares Issued in Transaction (in Shares) | 6,250,000 | |||||||||||||||||
| Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners | 9.00% | 49.00% | ||||||||||||||||
| Letters of Credit Outstanding, Amount | 77,000 | |||||||||||||||||
| Loss Contingency, Damages Sought, Value | 2,500,000 | 1,200,000 | ||||||||||||||||
| Loss Contingency Amount Claimed for Recovery of Damages | 4,900,000 | |||||||||||||||||
| Gain Contingency, Unrecorded Amount | 15,000,000 | |||||||||||||||||
| Previously Accrued Seeking Payments | $ 400,000 | $ 1,100,000 | $ 1,400,000 | |||||||||||||||
| Number of Patents Relating to Power Technology | 5 | |||||||||||||||||
| Number of Comaro Patents | 5 | |||||||||||||||||