Quarterly report pursuant to Section 13 or 15(d)

Segment Reporting (Narrative) (Details)

v3.21.2
Segment Reporting (Narrative) (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2021
USD ($)
Sep. 30, 2020
USD ($)
Sep. 30, 2021
USD ($)
segment
Sep. 30, 2020
USD ($)
Dec. 31, 2020
USD ($)
Segment Reporting Information [Line Items]          
Number of business segments | segment     2    
Total revenues $ 83,744,000 $ 79,197,000 $ 241,084,000 $ 236,999,000  
Foreign Locations [Member]          
Segment Reporting Information [Line Items]          
Total revenues     0 $ 0  
Long lived assets $ 0   $ 0   $ 0