Repurchase of Common Stock - Effects on Stockholders' Equity (Details Narrative) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Notes to Financial Statements
Cost of common stock repurchased	$ 216	$ 0	$ 216	$ 0
Share repurchase allocated to paid in capital	15	0	15	0
Share repurchase allocated to retained earnings	$ 201	$ 0	$ 201	$ 0
Stock repurchase authority remiaining			188,625		188,655
Shares repurchased and retired during period - shares	30	0	30	0
Repurchase of common stock previously authorized					500,000