Note 5 - Income Per Share - Weighted Average Shares Outstanding (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Basic earnings per common share:
Net income (loss)	$ 122,554	$ (209,532)	$ 60,299	$ (132,448)
Weighted average basic shares outstanding (in shares)	35,588,775	35,588,775	35,588,775	35,578,519
Basic income (loss) per common share (in dollars per share)		$ (0.01)
us-gaap_EarningsPerShareDilutedAbstract
Net income (loss) allocable to common shareholders	$ 122,554	$ (209,532)	$ 60,299	$ (132,448)
Weighted average basic shares outstanding (in shares)	35,588,775	35,588,775	35,588,775	35,578,519
Diluted effect:
Weighted average dilutive shares outstanding (in shares)	35,588,775	35,588,775	35,588,775	35,578,519
Dilutive income (loss) per common share (in dollars per share)		$ (0.01)
Restricted Stock [Member]
Diluted effect:
Unvested restricted stock (in shares)