Earnings Per Share (Details) - USD ($)	3 Months Ended		6 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Notes to Financial Statements
Income (loss) per share - diluted	$ 0.04	$ (0.12)			$ (0.14)	$ (0.51)
Income (loss) per share - basic	$ 0.04	$ (0.12)			$ (0.14)	$ (0.51)
Net income (loss)	$ 212,467	$ (661,925)	$ (947,751)	$ (2,038,955)	$ (735,284)	$ (2,700,880)
Weighted average shares outstanding - diluted	5,306,747	5,307,113			5,306,929	5,307,126
Weighted average shares outstanding - basic	5,306,747	5,307,113			5,306,929	5,307,126