Stockholders' Equity - Schedule of Share-based Compensation, Stock Options, Activity (Details) - $ / shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Note 9 - Stockholders' Equity (Details) - Summary of Status of All Stock Option Plans [Line Items]
Options Outstanding, Balance	409,878	447,666
Options Outstanding, Granted
Options Outstanding, Exercised	1,800	6,000
Options Outstanding, Balance	388,600	409,878
Weighted Average Exercise Price, Granted
Stock Option Plans [Member]
Note 9 - Stockholders' Equity (Details) - Summary of Status of All Stock Option Plans [Line Items]
Options Outstanding, Balance	705,990	685,867
Options Outstanding, Granted		57,911
Options Outstanding, Exercised	(1,800)	(6,000)
Options Outstanding, Forfeited or expired	(19,468)	(31,788)
Options Outstanding, Balance	684,722	705,990
Options Outstanding, Exercisable at year-end	684,722	705,990
Options Outstanding, Vested or expected to vest at year-end	684,571	704,763
Weighted Average Exercise Price, Outstanding Beginning Balance	$ 2.63	$ 2.7
Weighted Average Exercise Price, Granted		1.8
Weighted Average Exercise Price, Exercised	0.81	0.79
Weighted Average Exercise Price, Forfeited or expired	2.74	3.26
Weighted Average Exercise Price, Outstanding Ending Balance	2.64	2.63
Weighted Average Exercise Price, Exercisable at year-end	2.64	2.63
Weighted Average Exercise Price, Vested or expected to vest at year-end	2.64	2.64
Weighted average fair value of options granted during the period	$ 2.64	$ 2.63