Stockholders' Equity - Schedule of Share-based Compensation, Activity (Details) - shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Note 9 - Stockholders' Equity (Details) - Summary of Inactive Plans [Line Items]
Options Outstanding, Beginning Balance	388,610	409,878
Options Outstanding, Granted
Options Outstanding, Exercised		(1,800)
Options Outstanding, Cancelled	(193,998)	(19,468)
Options Outstanding, Ending Balance	194,612	388,610
2008 Stock Option Plan [Member]
Note 9 - Stockholders' Equity (Details) - Summary of Inactive Plans [Line Items]
Options Outstanding, Beginning Balance	380,611	395,545
Options Outstanding, Granted
Options Outstanding, Exercised		(1,800)
Options Outstanding, Cancelled	(186,666)	(13,134)
Options Outstanding, Ending Balance	193,945	380,611
2005 Stock Option Plan [Member]
Note 9 - Stockholders' Equity (Details) - Summary of Inactive Plans [Line Items]
Options Outstanding, Beginning Balance	7,666	14,000
Options Outstanding, Granted
Options Outstanding, Exercised
Options Outstanding, Cancelled	(6,999)	(6,334)
Options Outstanding, Ending Balance	667	7,666
Supplemental Stock Option Agreement [Member]
Note 9 - Stockholders' Equity (Details) - Summary of Inactive Plans [Line Items]
Options Outstanding, Beginning Balance	333	333
Options Outstanding, Granted
Options Outstanding, Exercised
Options Outstanding, Cancelled	(333)
Options Outstanding, Ending Balance		333