Note 8 - Summary of Stock Options (Details) - Summary of Option Activity Under All Plans - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Note 8 - Summary of Stock Options (Details) - Summary of Option Activity Under All Plans [Line Items]
Weighted average exercise price	$ 0.88
Vested and exercisable and expected to vest, end of period		2,784,084
Vested and exercisable and expected to vest, end of period	$ 0.91
Vested and exercisable and expected to vest, end of period	8 years 346 days
Vested and exercisable and expected to vest, end of period	$ 82,195
Vested and exercisable, end of period		718,086
Vested and exercisable, end of period	$ 1.93
Vested and exercisable, end of period	7 years 262 days
Vested and exercisable, end of period	$ 697,679
Options granted		735,000
Options granted	$ 0.45
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
End of Period [Member]
Note 8 - Summary of Stock Options (Details) - Summary of Option Activity Under All Plans [Line Items]
Options outstanding		3,005,783
Weighted average exercise price	$ 0.88
Weighted average remaining contractual term	8 years 357 days
Aggregate Intrinsic Value	$ 764,669