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Note 4 - Debts and Commitments (Details Textual)
1 Months Ended 12 Months Ended
Nov. 30, 2015
USD ($)
ft²
a
Sep. 30, 2018
USD ($)
Sep. 30, 2017
USD ($)
ft²
Sep. 30, 2016
USD ($)
Sep. 30, 2013
USD ($)
Sep. 30, 2014
ft²
Payments to Acquire Property, Plant, and Equipment, Total   $ 212,000 $ 253,000 $ 3,779,000    
Operating Leases, Rent Expense, Net, Total   $ 996,000 $ 742,000 $ 745,000    
Measurement Input, Discount Rate [Member]            
Incentive Plan Future Commitment, Measurement Input   6.00%        
San Francisco Office [Member]            
Area of Real Estate Property | ft²           6,200
Lessee, Operating Lease, Renewal Term           5 years
Operating Lease, Monthly Rent   $ 28,000        
Englewood, Colorado Office [member]            
Area of Real Estate Property | ft²     9,800      
Operating Lease, Monthly Rent   $ 21,000        
UTAH | Building [Member]            
Area of Real Estate Property | ft² 30,700          
Utah [Member] | Land [Member]            
Area of Land | a 3.6          
Utah [Member] | Land and Building [Member]            
Payments to Acquire Property, Plant, and Equipment, Total $ 1,240,000          
Margin Account [Member]            
Proceeds from Issuance of Debt         $ 29,500,000  
Margin Account [Member] | Fed Funds Rate [Member]            
Debt Instrument, Basis Spread on Variable Rate         0.50%  
Debt Instrument, Interest Rate, Effective Percentage   2.50%        
Real Estate Bank Loan Secured by Logan Office [Member]            
Loans Payable to Bank, Total $ 2,260,000 $ 1,960,000        
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate 4.66%          
Debt Instrument, Periodic Payment, Total $ 17,600