Leases - Future Minimum Operating Lease Payments (Details) - USD ($)	Dec. 31, 2019	Jan. 01, 2019
Leases [Abstract]
2020	$ 3,085,000
2021	1,413,000
2022	1,316,000
2023	477,000
2024 and thereafter	603,000
Total minimum lease payments	6,894,000
Less amount representing interest	(581,000)
Present value of net minimum operating lease payments	6,313,000	$ 10,469
Less current installments of obligation under current-operating lease liabilities	2,831,000
Obligations under long-term operating lease liabilities, excluding current installments	$ 3,482,000
Weighted-average remaining lease term - operating leases	3 years 18 days
Weighted-average discount rate - operating leases	5.50%