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Note 3 - NTI ASEAN (Tables)
 12 Months Ended
Aug. 31, 2013
Business Combinations [Abstract]  
Schedule of Business Acquisitions, by Acquisition [Table Text Block]
Net assets acquired (liabilities assumed):
     
Cash and cash equivalents
  $ 1,613,000  
Accounts receivables
    1,342,000  
Investments in joint ventures
    4,967,000  
Value of assets
  $ 7,922,000  
Purchase price:
       
Fair value of non-controlling interest
  $ 3,961,000  
Value of previously held interest
    3,961,000  
Total consideration
  $ 7,922,000  
Business Acquisition, Pro Forma Information [Table Text Block]
   
As Reported
   
NTI
Asean
   
Eliminated in
Consolidation
   
Pro Forma
 
Net sales
  $ 22,781,653     $ —     $ —     $ 22,781,653  
Cost of goods sold 
    14,528,785       —       —       14,528,785  
Gross profit 
    8,252,868       —       —       8,252,868  
Joint venture operations
    10,142,707       3,395,354       (1,414,248 )     12,123,813  
Operating expenses
    13,825,806       185,700       —       14,011,506  
Operating income
    4,569,769       3,209,654       (1,414,248 )     6,365,175  
Income before income tax expense                                                                
    4,616,646       3,209,654       (1,414,248 )     6,412,052  
Income tax expense 
    1,041,000       381,466       —       1,422,466  
Net income 
    3,575,646       2,828,188       (1,414,248 )     4,989,586  
Net income attributable to non-controlling interest
    127,450       (1,131,275 )     —       (1,003,825 )
Net income attributable to NTIC
    3,448,196       1,696,913       (1,414,248 )     3,730,861  
Net income per common diluted share
  $ 0.78     $ 0.38     $ (0.32 )   $ 0.84