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Note 7 - Loan Payable: (Detail) (USD $)
 1 Months Ended 0 Months Ended 1 Months Ended 0 Months Ended 9 Months Ended 12 Months Ended 9 Months Ended 12 Months Ended 9 Months Ended 9 Months Ended 1 Months Ended
Jan. 23, 2012
Nov. 11, 2011
Jan. 31, 2013
Aug. 31, 2011
Feb. 16, 2010
Sep. 30, 2012
Dec. 31, 2012
Foreign Exchange Risk [Member]
Sep. 30, 2012
Operating Demand Loan [Member]
Dec. 31, 2012
Operating Demand Loan [Member]
Dec. 31, 2012
Maximum [Member]
2012 DLR Loan [Member]
Sep. 30, 2012
Stock Repurchase [Member]
Dec. 31, 2012
Aggregate Advances [Member]
2012 DLR Loan [Member]
Sep. 30, 2012
2012 DLR Loan [Member]
Dec. 31, 2012
2012 DLR Loan [Member]
Jul. 28, 2011
2012 DLR Loan [Member]
Dec. 31, 2012
2012 DLPR Loan [Member]
Mar. 31, 2012
2011 DLR [Member]
Dec. 31, 2012
DLR Loan [Member]
Line of Credit Facility, Maximum Borrowing Capacity (in Dollars) $ 4,000,000           $ 3,500,000   $ 1,000,000 $ 14,000,000       $ 14,000,000     $ 4,000,000  
Debt Instrument, Basis Spread on Variable Rate                 1.25%     2.50%   1.25%   1.25%    
Line of Credit Facility, Increase, Additional Borrowings     5,200,000 2,500,000           2,000,000                
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage                     0.20%              
Line of Credit Facility Maturity                         4 years          
Line of Credit Facility, Current Borrowing Capacity                             2,500,000      
Stock Repurchased During Period, Shares (in Shares) 4,114,437 23,765     2,371,204                       7,570,236  
Share Price (in Dollars per share) $ 1.50 $ 0.78                             $ 0.77  
Stock Repurchased During Period, Value (in Dollars) 5,829,082 18,442 6,171,656                           5,829,082  
Payments of Stock Issuance Costs     110,000                           64,000  
Line of Credit Facility, Amount Outstanding                                   3,700,000
Line of Credit Facility, Covenant Period             18 months                      
Derivative Asset, Fair Value, Gross Asset             29,300,000                      
Line of Credit Facility, Monitoring Fee               500                    
Line of Credit Facility Maximum Annual Capital Expenditure Ceiling           $ 3,600,000