Note 3 - Fair Value Measurements (Details) - Summary of Changes in Fair Value of Preferred Stock Warrant Liabilities (USD $)	1 Months Ended	3 Months Ended			9 Months Ended
	Sep. 23, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013		Dec. 30, 2013
Summary of Changes in Fair Value of Preferred Stock Warrant Liabilities [Abstract]
Fair value			$ 580,187	$ 602,188			$ 623,672	[1]	$ 623,672
Change in fair value recorded in other income (expense), net		(7,277)	(22,001)	(21,484)	50,762	11,230
Extinguishment of warrant liabilities pursuant to the Merger Agreement (reclassified to equity)	$ (573,000)	$ (572,910)			$ (572,910)

[1] The balance sheet as of December 31, 2013 has been derived from the audited financial statements at that date.