Note 9 - Stock Options and Warrants - Stock Option Activity (Details) - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Outstanding Beg. of Year, Shares (in shares)		8,568
Outstanding Beg. of Year, Price (in dollars per share)		$ 0.95
Granted, Shares (in shares)	0
Granted, Price (in dollars per share)
Cancelled/Expired, Shares (in shares)		(8,568)
Cancelled/Expired, Price (in dollars per share)		$ 0.95
Exercised, Shares (in shares)	0	0
Exercised, Price (in dollars per share)
Outstanding End of Year, Shares (in shares)	0
Outstanding End of Year, Price (in dollars per share)
Exercisable End of Year, Shares (in shares)
Exercisable End of Year, Price (in dollars per share)