Note 5 - Share-Based Compensation - Stock Options Activity (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Options outstanding - beginning of year (in shares)	645,000	690,000
Options outstanding - beginning of year (in dollars per share)	$ 0.38	$ 0.39
Options outstanding - beginning of year	3 years 273 days	4 years 288 days	5 years 222 days
Exercise of non-restricted stock awards (in shares)	(7,000)
Exercised (in dollars per share)	$ 0.05
Options outstanding - end of year (in shares)	638,000	645,000	690,000
Options outstanding - end of year (in dollars per share)	$ 0.38	$ 0.38	$ 0.39
Options exercisable - December 31, 2014 (in shares)	610,000	605,000
Options exercisable - December 31, 2014 (in dollars per share)	$ 0.39	$ 0.39
Options exercisable - December 31, 2014	3 years 204 days	4 years 204 days
Granted (in shares)		35,000
Granted (in dollars per share)		$ 0.05
Forfeited / Cancelled (in shares)		(80,000)
Forfeited / Cancelled (in dollars per share)		$ 0.37