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Note 12 - Commitments and Contingencies (Details Textual)
12 Months Ended
Oct. 31, 2016
USD ($)
Jul. 18, 2016
USD ($)
Jul. 31, 2017
USD ($)
Sep. 30, 2017
USD ($)
Jun. 30, 2017
USD ($)
May 05, 2017
USD ($)
Mar. 31, 2017
USD ($)
Jun. 29, 2016
USD ($)
Agreements to Acquire Land and Construct New Headquarters Facility, Aggregate Amount               $ 1,900,000
Contrail Loan Agreement's, Revolving Line of Credit [Member]                
Guarantor Obligations, Maximum Exposure, Undiscounted           $ 1,600,000    
Contrail Aviation Inc. [Member] | Other Noncurrent Liabilities [Member]                
Business Combination, Contingent Consideration Arrangement, Earnout Payment   $ 2,900,000            
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Earnout Liability         $ 2,900,000   $ 2,900,000  
Contrail Aviation Inc. [Member] | EBITDA Range 1 [Member] | Subsequent Event [Member]                
Business Combination, Contingent Consideration, Liability, Current     $ 1,000,000          
Contrail Aviation Support LLC. [Member] | Contrail Aviation Inc. [Member]                
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value High, Per Year   1,500,000            
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High   3,000,000            
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Earnout Liability   2,900,000            
Payments to Acquire Businesses, Gross   4,033,368            
Contrail Aviation Support LLC. [Member] | Contrail Aviation Inc. [Member] | EBITDA Range 1 [Member]                
Business Combination, Contingent Consideration Arrangements, EBITDA Threshold   1,500,000            
Business Combination, Contingent Consideration Arrangement, Earnout Payment   0            
Contrail Aviation Support LLC. [Member] | Contrail Aviation Inc. [Member] | EBITDA Range 1 [Member] | Subsequent Event [Member]                
Earnings Before Interest, Tax, Depreciation and Amortization     $ 2,100,000          
Contrail Aviation Support LLC. [Member] | Contrail Aviation Inc. [Member] | EBITDA Range 1 [Member] | Maximum [Member]                
Business Combination, Contingent Consideration Arrangements, EBITDA Threshold   1,500,000            
Contrail Aviation Support LLC. [Member] | Contrail Aviation Inc. [Member] | EBITDA Range 2 [Member]                
Business Combination, Contingent Consideration Arrangements, EBITDA Threshold   1,500,000            
Business Combination, Contingent Consideration Arrangement, Earnout Payment   $ 1,500,000            
Business Combination, Contingent Consideration Arrangement, Earnout Payment Calculation, Multiplier   2            
Contrail Aviation Support LLC. [Member] | Contrail Aviation Inc. [Member] | EBITDA Range 2 [Member] | Maximum [Member]                
Business Combination, Contingent Consideration Arrangements, EBITDA Threshold   $ 2,000,000            
Contrail Aviation Support LLC. [Member] | Contrail Aviation Inc. [Member] | EBITDA Range 2 [Member] | Minimum [Member]                
Business Combination, Contingent Consideration Arrangements, EBITDA Threshold   1,500,000            
Contrail Aviation Support LLC. [Member] | Contrail Aviation Inc. [Member] | EBITDA Range 3 [Member]                
Business Combination, Contingent Consideration Arrangement, Earnout Payment   1,000,000            
Contrail Aviation Support LLC. [Member] | Contrail Aviation Inc. [Member] | EBITDA Range 3 [Member] | Maximum [Member]                
Business Combination, Contingent Consideration Arrangements, EBITDA Threshold   4,000,000            
Contrail Aviation Support LLC. [Member] | Contrail Aviation Inc. [Member] | EBITDA Range 3 [Member] | Minimum [Member]                
Business Combination, Contingent Consideration Arrangements, EBITDA Threshold   2,000,000            
Contrail Aviation Support LLC. [Member] | Contrail Aviation Inc. [Member] | EBITDA Range 4 [Member]                
Business Combination, Contingent Consideration Arrangements, EBITDA Threshold   1,500,000            
Business Combination, Contingent Consideration Arrangement, Earnout Payment   1,500,000            
Contrail Aviation Support LLC. [Member] | Contrail Aviation Inc. [Member] | EBITDA Range 4 [Member] | Minimum [Member]                
Business Combination, Contingent Consideration Arrangements, EBITDA Threshold   4,000,000            
Contrail Aviation Support LLC. [Member] | Contrail Aviation Inc. [Member] | EBITDA Range 5 [Member]                
Business Combination, Contingent Consideration Arrangements, EBITDA Threshold   15,000,000            
Business Combination, Contingent Consideration Arrangement, Earnout Payment   3,000,000            
Contrail Aviation Support LLC. [Member] | Contrail Aviation Inc. [Member] | EBITDA Range 5 [Member] | Minimum [Member]                
Business Combination, Contingent Consideration Arrangements, EBITDA Threshold   $ 15,000,000            
Global Aviation Services, LLC [Member] | D&D GSE Support, Inc. [Member]                
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High $ 100,000              
Payments to Acquire Businesses, Gross 400,000              
Payments to Acquire Business, Additional Payment After Closing, Amount 100,000              
Payments to Acquire Business, Final Payment, Payable 100,000              
Payments to Acquire Business, Final Payment, Payable, Monthly Installments, Amount $ 16,667              
Global Aviation Services, LLC [Member] | D&D GSE Support, Inc. [Member] | Subsequent Event [Member]                
Business Combination, Contingent Consideration, Liability       $ 100,000