Note 9 - Stockholders' Equity (Details) - Summary of Inactive Plans	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Note 9 - Stockholders' Equity (Details) - Summary of Inactive Plans [Line Items]
Options Outstanding, Exercised	(256,818)	(2,464,332)
Two Thousand Eight Equity Incentive Plan [Member]
Note 9 - Stockholders' Equity (Details) - Summary of Inactive Plans [Line Items]
Options Outstanding, Balance (in Shares)	9,618,828	11,884,000
Options Outstanding, Exercised	(246,818)	(1,851,832)
Options Outstanding, Cancelled	(2,922,010)	(413,340)
Options Outstanding, Balance (in Shares)	6,450,000	9,618,828
Two Thousand Five Equity Incentive Plan [Member]
Note 9 - Stockholders' Equity (Details) - Summary of Inactive Plans [Line Items]
Options Outstanding, Balance (in Shares)	972,500	1,447,500
Options Outstanding, Exercised	(10,000)	(475,000)
Options Outstanding, Cancelled	(702,500)
Options Outstanding, Balance (in Shares)	260,000	972,500
Supplemental Stock Option Agreement [Member]
Note 9 - Stockholders' Equity (Details) - Summary of Inactive Plans [Line Items]
Options Outstanding, Balance (in Shares)			5,000
Options Outstanding, Balance (in Shares)	5,000	5,000	5,000
Inactive Plans [Member]
Note 9 - Stockholders' Equity (Details) - Summary of Inactive Plans [Line Items]
Options Outstanding, Balance (in Shares)	10,596,328	13,474,000
Options Outstanding, Exercised	(256,818)	(2,464,332)
Options Outstanding, Cancelled	(3,624,510)	(413,340)
Options Outstanding, Balance (in Shares)	6,715,000	10,596,328
Nineteen Ninety-Eight Stock Option/Stock Issuance Plan [Member]
Note 9 - Stockholders' Equity (Details) - Summary of Inactive Plans [Line Items]
Options Outstanding, Balance (in Shares)		137,500
Options Outstanding, Exercised		(137,500)