XML 106 R82.htm IDEA: XBRL DOCUMENT v3.22.0.1
Note 14 - Debt (Details Textual) - USD ($)
$ in Thousands
 1 Months Ended 3 Months Ended 12 Months Ended
Apr. 06, 2021
Nov. 01, 2020
Sep. 16, 2020
May 31, 2020
Sep. 30, 2020
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Feb. 03, 2022
Property, Plant and Equipment, Net, Ending Balance           $ 54,871,000 $ 54,161,000    
Debt Conversion, Converted Instrument, Amount           100,000 250,000 $ 250,000  
Proceeds from Issuance of Commercial Paper           2,100,000      
Repayments of Commercial Paper           $ 1,800,000      
Commercial Paper, Maturity Duration, Minimum (Day)           7 days      
Commercial Paper Maturity Duration, Maximum (Day)           86 days      
Commercial Paper           $ 400,000 75,000    
Board of Directors Authorized Debt Issuance               6,000,000  
Previous Board of Directors Remaining Debt Issuance               $ 2,250,000  
Board of Directors Remaining Debt Issuance           2,500,000      
Long-term Debt, Gross           31,492,000      
Secured Debt [Member]                  
Long-term Debt, Gross           300,000 0    
Subsequent Event [Member]                  
Board of Directors Authorized Debt Issuance                 $ 12,000,000
Revolving Credit Facility [Member]                  
Line of Credit Facility, Remaining Borrowing Capacity           2,000,000      
Long-term Line of Credit, Total           $ 0      
Debt Instrument, Term (Year)           5 years      
Allowable Debt Per Debt to Net Worth Coverage Ratio as Defined Facility           $ 41,200,000      
Outstanding Debt as Defined by Facility           31,500,000      
CrossDefaultProvisionAsDefinedByFacility           150,000      
Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]                  
Line of Credit Facility, Remaining Borrowing Capacity           2,000,000      
Three Bilateral Revolving Credit Facilities [Member]                  
Line of Credit Facility, Maximum Borrowing Capacity       $ 600,000          
Line of Credit Facility, Maximum Amount Outstanding During Period       300,000          
Repayments of Lines of Credit       $ 300,000          
Line of Credit Facility, Expiration Date       May 18, 2021          
Conversion of Existing Notes [Member]                  
Debt Conversion, Original Debt, Amount $ 1,700,000                
Payment of Financing and Stock Issuance Costs, Total 257,000                
Gain (Loss) on Extinguishment of Debt, Total $ 0                
Debt Conversion, Converted Instrument, Issuance Date Apr. 06, 2021                
Conversion of Existing Notes [Member] | Interest Expense [Member]                  
Debt Issuance Costs Incurred During Noncash or Partial Noncash Transaction $ 13,000                
Conversion of Existing Notes into New 2036 Notes [Member]                  
Debt Conversion, Converted Instrument, Amount $ 701,000                
Debt Conversion, Converted Instrument, Rate 2.891%                
Debt Conversion, Converted Instrument, Expiration or Due Date Apr. 06, 2036                
Conversion of Existing Notes into New 2071 Notes [Member]                  
Debt Conversion, Converted Instrument, Amount $ 1,000,000                
Debt Conversion, Converted Instrument, Rate 3.799%                
Debt Conversion, Converted Instrument, Expiration or Due Date Apr. 06, 2071                
Conversion of Existing Notes for New 2.973% Notes, Due September 16, 2062 [Member]                  
Debt Conversion, Original Debt, Amount     $ 1,047,000            
Debt Conversion, Converted Instrument, Amount     $ 1,047,000            
Debt Conversion, Converted Instrument, Rate     2.973%            
Debt Conversion, Converted Instrument, Issuance Date     Sep. 16, 2020            
Debt Conversion, Converted Instrument, Expiration or Due Date     Sep. 16, 2062            
Conversion of Existing Notes for New 2.973% Notes, Due September 16, 2062 [Member] | Minimum [Member]                  
Debt Conversion, Original Debt, Due Date of Debt     May 01, 2037            
Conversion of Existing Notes for New 2.973% Notes, Due September 16, 2062 [Member] | Maximum [Member]                  
Debt Conversion, Original Debt, Due Date of Debt     Mar. 01, 2049            
Conversion of Existing Notes for New 2.973% Notes, Due September 16, 2062 [Member] | Interest Expense [Member]                  
Debt Issuance Costs Incurred During Noncash or Partial Noncash Transaction         $ 9,000        
4.0% Notes, Due February 1, 2021 [Member]                  
Debt Instrument, Repurchase Amount   $ 500,000              
Debt Instrument, Interest Rate, Stated Percentage   4.00%              
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed   100.00%              
Debt Instrument, Repurchase Date   Nov. 01, 2020              
Existing Notes [Member]                  
Interest Paid, Including Capitalized Interest, Operating and Investing Activities, Total $ 14,000                
Conversion of Existing Notes for New 2.973% Notes, Due September 16, 2062 [Member]                  
Payment of Financing and Stock Issuance Costs, Total     $ 319,000            
Interest Paid, Including Capitalized Interest, Operating and Investing Activities, Total     4,000            
Gain (Loss) on Extinguishment of Debt, Total     $ 0            
Equipment [Member]                  
Property, Plant and Equipment, Net, Ending Balance           7,747,000 7,905,000    
Asset Pledged as Collateral [Member] | Equipment [Member]                  
Property, Plant and Equipment, Net, Ending Balance           $ 1,200,000 $ 1,300,000