Stockholders' Equity - Schedule of Share-based Compensation, Stock Options, Activity (Details) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Note 9 - Stockholders' Equity (Details) - Summary of Status of All Stock Option Plans [Line Items]
Options Outstanding, Balance	447,666	706,421
Options Outstanding, Granted
Options Outstanding, Exercised	(6,000)	(17,122)
Options Outstanding, Balance	409,878	447,666
Stock Option Plans [Member]
Note 9 - Stockholders' Equity (Details) - Summary of Status of All Stock Option Plans [Line Items]
Options Outstanding, Balance	685,867	801,289
Options Outstanding, Granted	57,911	230,000
Options Outstanding, Exercised	(6,000)	(17,121)
Options Outstanding, Forfeited or expired	(31,788)	(328,301)
Options Outstanding, Balance	705,990	685,867
Options Outstanding, Exercisable at year-end	705,990	685,867
Options Outstanding, Vested or expected to vest at year-end	704,763	676,299
Weighted Average Exercise Price, Outstanding Balance	$ 2.70	$ 3.15
Weighted Average Exercise Price, Granted	1.80	2.10
Weighted Average Exercise Price, Exercised	0.79	2.85
Weighted Average Exercise Price, Exercisable at year-end	3.26	3.60
Weighted Average Exercise Price, Forfeited or expired	2.63	2.70
Weighted Average Exercise Price, Vested or expected to vest at year-end	2.63	2.70
Weighted Average Exercise Price, Outstanding Balance	2.64	2.70
Weighted average fair value of options granted during the period	$ 2.63	$ 2.70