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Note 4 - Credit Facilities and Other Debt (Details Textual)
Feb. 04, 2020
MXN ($)
Apr. 10, 2019
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Jan. 09, 2018
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Mar. 15, 2016
MXN ($)
Jun. 30, 2020
USD ($)
Jun. 30, 2020
MXN ($)
Jun. 30, 2020
AUD ($)
Jun. 30, 2020
BRL (R$)
Oct. 05, 2018
USD ($)
Oct. 05, 2018
BRL (R$)
Jul. 03, 2018
USD ($)
Oct. 31, 2017
USD ($)
Oct. 31, 2017
AUD ($)
Debt Instrument, Interest Rate, Effective Percentage                  
Resource Plus Acquisition Note [Member]                          
Debt Instrument, Face Amount     $ 2,300,000                    
Notes Payable, Total         $ 1,600,000                
North Mill, LLC [Member]                          
Debt Instrument, Interest Rate, Effective Percentage         6.75% 6.75% 6.75% 6.75%          
Fifth Third Bank [Member]                          
Debt Instrument, Interest Rate, Effective Percentage         3.60% 3.60% 3.60% 3.60%          
National Australia Bank [Member]                          
Debt Instrument, Interest Rate, Effective Percentage         6.56% 6.56% 6.56% 6.56%          
Banco Santander [Member]                          
Debt Instrument, Interest Rate, Effective Percentage         16.52% 16.52% 16.52% 16.52%          
Steel Factoring [Member]                          
Debt Instrument, Interest Rate, Effective Percentage         18.00% 18.00% 18.00% 18.00%          
Ve Por Mas [Member]                          
Debt Instrument, Interest Rate, Effective Percentage         9.10% 9.10% 9.10% 9.10%          
Revolving Credit Facility [Member] | PNC Bank, National Association [Member]                          
Line of Credit Facility, Maximum Borrowing Capacity                     $ 9,500,000    
Revolving Credit Facility [Member] | North Mill, LLC [Member]                          
Proceeds from Lines of Credit, Total   $ 9,800,000                      
Debt Instrument, Face Amount   180,000                      
Debt Instrument, Payable Per Month   10,000                      
Line of Credit Facility, Commitment Fee Amount   $ 120,000                      
Debt Instrument, Interest Rate, Effective Percentage         6.75% 6.75% 6.75% 6.75%          
Long-term Line of Credit, Total         $ 6,600,000                
Percent Of Eligible Domestic Accounts Receivable Less Certain Reserves To Calculate Borrowing Availability   85.00%                      
Percent Of Eligible Domestic Unbilled Accounts Receivable Less Certain Reserves To Calculate Borrowing Availability   60.00%                      
Maximum Amount of Accounts Receivable Less Certain Reserves To Calculate Borrowing Availability   $ 4,500,000                      
Revolving Credit Facility [Member] | North Mill, LLC [Member] | Minimum [Member]                          
Debt Instrument, Interest Rate, Stated Percentage         6.75% 6.75% 6.75% 6.75%          
Revolving Credit Facility [Member] | North Mill, LLC [Member] | Prime Rate [Member]                          
Debt Instrument, Basis Spread on Variable Rate   1.25%                      
Revolving Credit Facility [Member] | North Mill, LLC [Member] | NM Loan Agreement [Member]                          
Debt Instrument, Term (Month)   1 year 180 days                      
Revolving Credit Facility [Member] | North Mill, LLC [Member] | NM Loan Agreement [Member] | SPAR Marketing Force [Member]                          
Line of Credit Facility, Maximum Borrowing Capacity   $ 12,500,000                      
Revolving Credit Facility [Member] | North Mill, LLC [Member] | NM Loan Agreement [Member] | SPAR Canada Company [Member]                          
Line of Credit Facility, Maximum Borrowing Capacity   $ 2,500,000                      
Revolving Credit Facility [Member] | Fifth Third Bank [Member]                          
Line of Credit Facility, Maximum Borrowing Capacity     $ 3,500,000                    
Long-term Line of Credit, Total         $ 700,000                
Percent Of Eligible Domestic Accounts Receivable Less Certain Reserves To Calculate Borrowing Availability     80.00%                    
Line of Credit Facility, Interest Rate at Period End         3.60% 3.60% 3.60% 3.60%          
Revolving Credit Facility [Member] | Fifth Third Bank [Member] | London Interbank Offered Rate (LIBOR) [Member]                          
Debt Instrument, Basis Spread on Variable Rate     2.50%                    
Revolving Credit Facility [Member] | National Australia Bank [Member]                          
Line of Credit Facility, Maximum Borrowing Capacity                       $ 550,000 $ 800,000
Long-term Line of Credit, Total         $ 15,000   $ 21,000            
Percent Of Eligible Domestic Accounts Receivable Less Certain Reserves To Calculate Borrowing Availability                       80.00% 80.00%
Revolving Credit Facility [Member] | Banco Santander [Member]                          
Line of Credit Facility, Maximum Borrowing Capacity                 $ 70,000 R$ 381,000      
Long-term Line of Credit, Total         2,000     R$ 13,000          
Revolving Credit Facility [Member] | Steel Factoring [Member]                          
Line of Credit Facility, Maximum Borrowing Capacity         $ 217,000 $ 5,000,000              
Debt Instrument, Interest Rate, Stated Percentage         18.00% 18.00% 18.00% 18.00%          
Long-term Line of Credit, Total         $ 217,000 $ 5,000,000              
Revolving Credit Facility [Member] | Ve Por Mas [Member]                          
Line of Credit Facility, Maximum Borrowing Capacity $ 5,200,000       226,000                
Long-term Line of Credit, Total         $ 205,000 $ 4,700,000              
Line of Credit Facility, Interest Rate at Period End         9.10% 9.10% 9.10% 9.10%          
Revolving Credit Facility [Member] | Ve Por Mas [Member] | Interbank Interest Rate [Member]                          
Debt Instrument, Basis Spread on Variable Rate 3.00%                        
Revolving Credit Facility [Member] | BBVA Bancormer [Member]                          
Line of Credit Facility, Maximum Borrowing Capacity       $ 5,000,000 $ 217,000                
Long-term Line of Credit, Total         $ 0                
Line of Credit Facility, Interest Rate at Period End         10.90% 10.90% 10.90% 10.90%          
Revolving Credit Facility [Member] | BBVA Bancormer [Member] | Interbank Interest Rate [Member]                          
Debt Instrument, Basis Spread on Variable Rate       5.20%