Note 3 - Earnings (Loss) Per Share - Reconciliation of Anti-dilutive Securities (Details) - shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Anti-dilutive Security (in shares)	43,343,224	43,775,016
Employee Stock Option [Member]
Anti-dilutive Security (in shares)	4,225,000	275,000
Warrant [Member]
Anti-dilutive Security (in shares)	27,020,000	27,860,000
Convertible Debt Securities [Member]
Anti-dilutive Security (in shares)	11,980,000	15,490,000
Shares Issuable For Accrued Interest [Member]
Anti-dilutive Security (in shares)	118,224	150,016