Quarterly report pursuant to Section 13 or 15(d)

Note 4 - Lease Receivable (Details Textual)

v3.22.1
Note 4 - Lease Receivable (Details Textual)
 3 Months Ended
Mar. 31, 2022
USD ($)
Mar. 31, 2021
USD ($)
Feb. 15, 2021
USD ($)
a
Nov. 30, 2019
ft²
Area of Land Damaged by Fire (Square Foot) | ft²       30,000
Sales-Type Lease, Net Investment in Lease, Excluding Accrued Interest, after Allowance for Credit Loss, Total $ 17,000,000.0      
Sales-Type Lease, Net Investment in Lease, Excluding Accrued Interest, after Allowance for Credit Loss, Implied Interest Rate 0.50%      
Proceeds from Sales-type Lease Payments, Financing Activities $ 185,000 $ 0    
Sales-type Lease, Interest Income $ 19,000      
Recycling Facility at TRIC [Member]        
Area of Real Estate Property (Acre) | a     136,750  
Lessor, Operating Lease, Lessee's First Option to Purchase     $ 14,250,000  
Lessor, Operating Lease, Lessee's Second Option to Purchase     15,250,000  
First Nonrefundable Deposit Subject to Purchase Option     1,250,000  
Second Nonrefundable Deposit Subject to Purchase Option     2,000,000.0  
Lessor, Operating Lease, Monthly Payments to be Received     68,000  
Lessor, Operating Lease, Monthly Payments to be Received in Last Six Months of Lease Term     $ 100,640