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Note 12 - Segment Information (Tables)
9 Months Ended
Aug. 31, 2013
Segment Reporting [Abstract]  
Schedule of Segment Reporting Information, by Segment [Table Text Block]
   

Agricultural Products

   

Pressurized Vessels

   

Modular Buildings

   

Consolidated

 

Net Sales from external customers

  $ 8,005,000     $ 635,000     $ 710,000     $ 9,350,000  

Income (loss) from operations

    145,000       22,000       (113,000 )     54,000  

Income (loss) before taxes

    108,000       14,000       (73,000 )     49,000  

Total Assets

    24,563,000       2,815,000       3,006,000       30,384,000  

Capital expenditures

    540,000       10,000       13,000       563,000  

Depreciation & Amortization

    113,000       26,000       49,000       188,000  
   

Agricultural Products

   

Pressurized Vessels

   

Modular Buildings

   

Consolidated

 

Net Sales from external customers

  $ 8,176,000     $ 566,000     $ 2,792,000     $ 11,534,000  

Income (loss) from operations

    1,027,000       10,000       570,000       1,607,000  

Income (loss) before taxes

    988,000       (47,000 )     554,000       1,495,000  

Total Assets

    24,082,000       2,722,000       6,090,000       32,894,000  

Capital expenditures

    289,000       0       5,000       294,000  

Depreciation & Amortization

    137,000       29,000       52,000       218,000  
   

Agricultural Products

   

Pressurized Vessels

   

Modular Buildings

   

Consolidated

 

Net Sales from external customers

  $ 22,727,000     $ 1,671,000     $ 2,618,000     $ 27,016,000  

Income (loss) from operations

    1,274,000       (114,000 )     406,000       1,566,000  

Income (loss) before taxes

    1,800,000       (200,000 )     420,000       2,020,000  

Total Assets

    24,563,000       2,815,000       3,006,000       30,384,000  

Capital expenditures

    737,000       18,000       18,000       773,000  

Depreciation & Amortization

    329,000       79,000       150,000       558,000  
   

Agricultural Products

   

Pressurized Vessels

   

Modular Buildings

   

Consolidated

 

Net Sales from external customers

  $ 20,170,000     $ 1,512,000     $ 7,849,000     $ 29,531,000  

Income (loss) from operations

    2,202,000       (108,000 )     1,369,000       3,463,000  

Income (loss) before taxes

    2,149,000       (278,000 )     1,318,000       3,189,000  

Total Assets

    24,082,000       2,722,000       6,090,000       32,894,000  

Capital expenditures

    1,929,000       5,000       27,000       1,961,000  

Depreciation & Amortization

    390,000       86,000       158,000       634,000