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Business Segments Segment Information (Details)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2023
USD ($)
Jun. 30, 2022
USD ($)
Jun. 30, 2023
USD ($)
segment
Jun. 30, 2022
USD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Segment Reporting Information [Line Items]            
Number of Operating Segments | segment     2      
Revenues:            
Real estate operations $ 58 $ 7,925 $ 2,551 $ 7,944    
Leasing operations 3,472 3,200 6,781 6,280    
Unaffiliated customers 3,530 11,125 9,332 14,224    
Cost of sales, excluding depreciation (3,841) (6,302) (9,589) (8,652)    
Depreciation and amortization (970) (884) (1,898) (1,757)    
General and administrative expenses (4,071) (3,444) (8,790) (6,611)    
Gain on sale of assets 0 0 0 4,812    
Operating income (loss) (5,352) 495 (10,945) 2,016    
Capital expenditures and purchases and development of real estate properties 25,528 20,078        
Total assets 485,755 484,660 485,755 484,660 $ 445,140  
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents 45,140 110,534 45,140 110,534 $ 45,709 $ 70,139
Leasing Operations            
Revenues:            
Leasing operations 3,472 3,200 6,781 6,280    
Eliminations and Other            
Revenues:            
Real estate operations 0 0 0 0    
Cost of sales, excluding depreciation 0 0 0 0    
Depreciation and amortization 4 5 9 9    
General and administrative expenses (4,071) (3,444) (8,790) (6,611)    
Gain on sale of assets       0    
Operating income (loss) (4,067) (3,441) (8,781) (6,608)    
Capital expenditures and purchases and development of real estate properties 0 31 0 213    
Total assets 46,470 112,711 46,470 112,711    
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents 43,200 102,300 43,200 102,300    
Operating Segments            
Revenues:            
Capital expenditures and purchases and development of real estate properties     44,561 39,666    
Operating Segments | Real Estate Operations            
Revenues:            
Real estate operations 58 7,925 2,551 7,944    
Cost of sales, excluding depreciation (2,697) (5,432) (7,184) (6,798)    
Depreciation and amortization (50) (24) (77) (49)    
General and administrative expenses 0 0 0 0    
Gain on sale of assets       0    
Operating income (loss) (2,689) 2,471 (4,710) 1,103    
Capital expenditures and purchases and development of real estate properties 12,057 7,227 21,084 12,091    
Total assets 328,033 265,929 328,033 265,929    
Operating Segments | Leasing Operations            
Revenues:            
Leasing operations 3,472 3,200 6,781 6,280    
Cost of sales, excluding depreciation (1,144) (870) (2,405) (1,854)    
Depreciation and amortization (924) (865) (1,830) (1,717)    
General and administrative expenses 0 0 0 0    
Gain on sale of assets       4,812    
Operating income (loss) 1,404 1,465 2,546 7,521    
Capital expenditures and purchases and development of real estate properties 13,471 12,820 23,477 27,362    
Total assets $ 111,252 106,020 $ 111,252 106,020    
Eliminations and Other            
Revenues:            
Unaffiliated customers   0   0    
Eliminations and Other | Real Estate Operations            
Revenues:            
Real estate operations   2   6    
Eliminations and Other | Leasing Operations            
Revenues:            
Leasing operations   0   0    
Eliminations and Other | Eliminations and Other            
Revenues:            
Real estate operations   $ (2)   $ (6)