Note 10 - Stock Options and Warrants - Stock Warrant Activity (Details) - $ / shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Outstanding Beg. of Year, Warrants (in shares)		52,632
Outstanding Beg. of Year, Warrants Price (in dollars per share)		$ 0.57
Granted, Warrants (in shares)
Granted, Warrants Price (in dollars per share)
Cancelled/Expired, Warrants (in shares)		(52,632)
Cancelled/Expired, Warrants Price (in dollars per share)		$ 0.57
Exercised, Warrants Price (in dollars per share)
Outstanding End of Year, Warrants (in shares)
Outstanding End of Year, Warrants Price (in dollars per share)
Exercisable End of Year, Warrants (in shares)
Exercisable End of Year, Warrants Price (in dollars per share)