For the three and nine months ended September 30, 2023 and 2022, respectively, our income per common share was calculated as follows: (Details) - USD ($)	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income	$ 301,364	$ 1,157,076	$ 983,305	$ 1,858,752	$ 517,636	$ (32,931)	$ 2,441,745	$ 2,343,457
Income per common share, diluted
Income (loss) per common share, diluted	$ 0.02			$ 0.15			$ 0.19	$ 0.19
Shares used in computing income per common share, basic:
Total shares	12,759,971			12,301,752			12,613,899	12,362,960
Shares used in computing income per common share, diluted	12,793,133			12,349,283			12,647,061	12,410,491
Unrestricted Shares [Member]
Income per common share, basic:
Income (loss) per common share, basic	$ 0.02			$ 0.15			$ 0.19	$ 0.19
Shares used in computing income per common share, basic:
Total shares	12,431,727			12,208,340			12,418,693	12,274,246
Restricted Shares [Member]
Income per common share, basic:
Income (loss) per common share, basic	$ 0.02			$ 0.15			$ 0.19	$ 0.19
Shares used in computing income per common share, basic:
Total shares	328,244			93,412			195,206	88,714