Income Taxes, Continuing Operations - Reconciliation of Income Tax Provision from Continuing Operations (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Computed "expected" tax	$ 534,000	$ 570,000
Increase in "expected" tax resulting from state income tax, net of federal income tax benefit	158,000	141,000
Nondeductible expenses and other	13,000	23,000
Total Income tax expense	$ 705,000	$ 734,000