Note 8 - Summary of Stock Options (Details) - Summary of Option Activity Under All Plans (USD $)	3 Months Ended
	Mar. 31, 2015
Note 8 - Summary of Stock Options (Details) - Summary of Option Activity Under All Plans [Line Items]
Vested and exercisable and expected to vest, end of period	2,664,185
Vested and exercisable and expected to vest, end of period	$ 0.93
Vested and exercisable and expected to vest, end of period	9 years 58 days
Vested and exercisable, end of period	608,492
Vested and exercisable, end of period	$ 2.16
Vested and exercisable, end of period	7 years 251 days
Options granted	635,000
Options granted	$ 0.47
Options canceled	(21,000)
Options canceled	$ 1.00
Beginning of Period [Member]
Note 8 - Summary of Stock Options (Details) - Summary of Option Activity Under All Plans [Line Items]
Options outstanding	2,291,783
Weighted average exercise price	$ 1.02
Weighted average remaining contractual term	9 years 116 days
Weighted average remaining contractual term	9 years 116 days
End of Period [Member]
Note 8 - Summary of Stock Options (Details) - Summary of Option Activity Under All Plans [Line Items]
Weighted average remaining contractual term	9 years 73 days
Options outstanding	2,905,783
Weighted average exercise price	$ 0.90
Weighted average remaining contractual term	9 years 73 days