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Note 6 - Line of Credit and Long-term Debt (Details Textual) - USD ($)
1 Months Ended 3 Months Ended 6 Months Ended 9 Months Ended
Apr. 12, 2021
Aug. 30, 2016
Sep. 18, 2015
Jul. 30, 2015
Aug. 14, 2012
Apr. 30, 2021
May 31, 2020
Apr. 30, 2019
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2020
Sep. 30, 2021
Mar. 31, 2021
Oct. 06, 2017
Line of Credit, Current                 $ 0   $ 0 $ 0     $ 1,000,000  
Repayments of Notes Payable     $ 500,000                          
Long-term Debt and Capital Lease Obligations, Current and Noncurrent                 4,111,000   4,111,000 4,111,000        
Debt Issuance Costs, Net, Total                 119,000   119,000 119,000     140,000  
Proceeds from Issuance of Unsecured Debt                       0 $ 1,381,000      
Gain (Loss) on Extinguishment of Debt, Total                 0 $ 1,389,000   0 1,389,000      
Long-term Debt, Current Maturities, Total                 626,000   626,000 626,000     2,210,000  
Interest Paid, Excluding Capitalized Interest, Operating Activities                       268,000 $ 344,000      
Long-term Debt, Excluding Current Maturities, Total                 4,400,000   4,400,000 4,400,000     4,823,000  
Long-term Debt, Total                 5,145,000   5,145,000 5,145,000        
Unsecured Subordinated Loan [Member]                                
Long-term Debt, Gross                 $ 1,000,000   $ 1,000,000 $ 1,000,000     1,500,000  
The 2015 Loan Agreement [Member]                                
Debt Instrument Reference Rate                 3.25%   3.25% 3.25%        
Proceeds from Issuance of Debt       $ 2,500,000                        
Debt Instrument, Term (Year)       7 years                        
Debt Instrument, Prepayment Penalty Percentage       5.00%                        
Debt Instrument, Prepayment Penalty Percentage Reduction During Each Year       1.00%                        
Long-term Debt and Capital Lease Obligations, Current and Noncurrent                 $ 324,000   $ 324,000 $ 324,000     635,000  
Debt Instrument One Time Origination and Guaranty Fees                     $ 113,900          
Debt Instrument Annual Renewal Fee Payable Percentage                 0.50%   0.50% 0.50%        
Debt Instrument Guaranteed Portion                 80.00%   80.00% 80.00%        
Term Loan Agreement, Maturing on August 14, 2032 [Member]                                
Debt Instrument Reference Rate                 3.25%   3.25% 3.25%        
Debt Instrument, Basis Spread on Variable Rate                     1.00%          
Proceeds from Issuance of Debt         $ 5,500,000                      
Long-term Debt and Capital Lease Obligations, Current and Noncurrent                 $ 3,787,000   $ 3,787,000 $ 3,787,000     3,978,000  
Debt Instrument Interest Payment Period (Month)         12 months                      
Debt Instrument Amortization Period (Year)         19 years                      
Debt Instrument One Time Origination and Guaranty Fees                     $ 214,500          
Debt Instrument Annual Renewal Fee Payable Percentage                 0.25%   0.25% 0.25%        
Debt Instrument Guaranteed Portion                 80.00%   80.00% 80.00%        
Term Loan Agreement, Promissory Note One [Member]                                
Proceeds from Issuance of Debt         $ 2,250,000                      
Term Loan Agreement, Promissory Note Two [Member]                                
Proceeds from Issuance of Debt         $ 3,250,000                      
SBA CARES Act Paycheck Protection Program [Member]                                
Proceeds from Issuance of Unsecured Debt             $ 1,381,000                  
Debt Instrument, Decrease, Principal Forgiveness                   1,381,000            
Debt Instrument, Decrease, Accrued Interest Forgiveness                   8,000            
Gain (Loss) on Extinguishment of Debt, Total                   $ 1,389,000            
Skywords Note [Member]                                
Repayments of Long-term Debt, Total $ 500,000         $ 500,000                    
Interest Paid, Excluding Capitalized Interest, Operating Activities $ 1,900         1,900                    
Skywords Note [Member] | Unsecured Subordinated Loan [Member]                                
Debt Instrument, Face Amount               $ 1,500,000                
Long-term Debt, Current Maturities, Total           $ 500,000                 500,000  
Long-term Debt, Gross                 $ 1,000,000   $ 1,000,000 $ 1,000,000     1,500,000  
Long-term Debt, Excluding Current Maturities, Total                             1,000,000  
Long-term Debt, Total                 1,000,000   1,000,000 1,000,000     1,500,000  
Skywords Amended Note [Member]                                
Debt Instrument, Term (Year) 3 years                              
Debt Instrument, Face Amount $ 500,000                              
Debt Instrument, Floor Interest Rate 5.00%         5.00%                    
Equipment Finance Agreement [Member]                                
Debt Instrument, Interest Rate, Stated Percentage                               4.75%
Debt Agreement, Maximum Borrowing Capacity                               $ 175,000
Long-term Debt, Total                 34,000   $ 34,000 34,000     60,000  
Minimum [Member] | The 2015 Loan Agreement [Member]                                
Debt Instrument, Interest Rate, Stated Percentage       6.00%                        
Minimum [Member] | Term Loan Agreement, Maturing on August 14, 2032 [Member]                                
Debt Instrument, Interest Rate During Period                     5.50%          
Prime Rate [Member] | The 2015 Loan Agreement [Member]                                
Debt Instrument, Basis Spread on Variable Rate       2.00%                        
Prime Rate [Member] | Skywords Note [Member] | Unsecured Subordinated Loan [Member]                                
Debt Instrument, Basis Spread on Variable Rate               1.00%                
Prime Rate [Member] | Skywords Amended Note [Member]                                
Debt Instrument, Basis Spread on Variable Rate 1.00%                              
First Foundation Bank [Member]                                
Line of Credit, Current                 0   $ 0 0     1,000,000  
First Foundation Bank [Member] | Minimum [Member]                                
Debt Instrument, Interest Rate, Stated Percentage   5.25%                            
First Foundation Bank [Member] | Revolving Credit Facility [Member]                                
Line of Credit Facility, Maximum Borrowing Capacity   $ 2,000,000             2,000,000   2,000,000 2,000,000        
Line of Credit, Current                 $ 0   $ 0 $ 0     $ 1,000,000  
First Foundation Bank [Member] | Revolving Credit Facility [Member] | Prime Rate [Member]                                
Debt Instrument Reference Rate                           3.25%    
Debt Instrument, Basis Spread on Variable Rate   2.00%