Note 11 - Subsequent Events (Details) - Preferred Stock Outstanding	0 Months Ended
	Oct. 01, 2014	Sep. 30, 2014	Dec. 31, 2013	Nov. 10, 2014
Series A Preferred Stock [Member] \| Subsequent Event [Member]
Class of Stock [Line Items]
Preferred Shares Outstanding	1,151,468
Conversion into Common Shares upon Initial Public Offering	1,151,468
Series A Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Shares Outstanding		1,151,468	1,151,468
Series B Preferred Stock [Member] \| Subsequent Event [Member]
Class of Stock [Line Items]
Preferred Shares Outstanding	994,885
Conversion into Common Shares upon Initial Public Offering	994,885
Series B Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Shares Outstanding		994,885	994,885
Series E Preferred Stock [Member] \| Subsequent Event [Member]
Class of Stock [Line Items]
Preferred Shares Outstanding	4,322,126
Conversion into Common Shares upon Initial Public Offering	5,579,571
Series E Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Shares Outstanding		4,322,126	4,322,126
Subsequent Event [Member]
Class of Stock [Line Items]
Preferred Shares Outstanding	6,468,479			0
Conversion into Common Shares upon Initial Public Offering	7,725,924