Leases - Operating and Finance Lease Liability (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Leases, Operating [Abstract]
2021	$ 4,667,000
2022	3,462,000
2023	2,993,000
2024	1,605,000
2025	1,001,000
Thereafter	519,000
Total	14,247,000
Less: present value discount*	(1,802,000)
Present value of lease liabilities	12,445,000
Less: current portion of lease liabilities	(3,905,000)	$ (5,955,000)
Total long-term lease liabilities	8,540,000	$ 13,196,000
Lessee, Finance Lease, Description [Abstract]
2021	190,000
2022	160,000
2023	99,000
2024	77,000
2025	0
Thereafter	0
Total	526,000
Less: present value discount*	(49,000)
Present value of lease liabilities	477,000
Less: current portion of lease liabilities	(164,000)
Total long-term lease liabilities	313,000
Operating And Finance Lease Liabilities, Payments Due [Abstract]
2021	4,857,000
2022	3,622,000
2023	3,092,000
2024	1,682,000
2025	1,001,000
Thereafter	519,000
Total	14,773,000
Less: present value discount*	(1,851,000)
Present value of lease liabilities	12,922,000
Less: current portion of lease liabilities	(4,069,000)
Total long-term lease liabilities	$ 8,853,000