Restatement of Previously Issued Consolidated Financial Statements, Consolidated Balance Sheets (Details) - USD ($)	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Condensed Balance Sheets [Abstract]
Income taxes payable	$ 414,000	$ 496,000	$ 480,000	$ 363,000	$ 111,000
Total liabilities	660,000	763,000	712,000	636,000	487,000
Total equity	3,028,000	$ 3,009,000	$ 3,361,000	$ 3,978,000	$ 3,686,000	$ 3,153,000
Amount Previously Reported [Member]
Condensed Balance Sheets [Abstract]
Income taxes payable	114,000
Total liabilities	361,000
Total equity	$ 3,327,000