Repurchase of Common Stock - Effects on Stockholders' Equity (Details Narrative) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Notes to Financial Statements
Cost of common stock repurchased	$ 0	$ 0	$ 0	$ 0
Share repurchase allocated to paid in capital	0	0	0	0
Share repurchase allocated to retained earnings	$ 0	$ 0	$ 0	$ 0
Stock repurchase authority remiaining			188,655		188,655
Shares repurchased and retired during period - shares	0	0	0	0
Repurchase of common stock previously authorized					500,000