Investments (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Short-term Investments [Abstract]
Accumulated Cost	$ 10,669,000	$ 6,279,000
Unrealized Gain	0	0
Unrealized (Loss)	(8,000)	0
Market Value	10,661,000	6,279,000
Long-term investments	0	0
Government securities
Short-term Investments [Abstract]
Accumulated Cost	10,669,000	6,279,000
Unrealized Gain	0	0
Unrealized (Loss)	(8,000)	0
Market Value	$ 10,661,000	$ 6,279,000