Note 12 - Stockholders' Equity - Warrants Issued to Executive Officer (Details) - Warrant [Member] - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Balance, Amount of Options (in shares)
Balance, Weighted Average Exercise Price (in dollars per share)
Balance, Weighted Average remaining Contractual Term (Year)	9 years 292 days
Granted, Amount of Options (in shares)	317,460
Granted, Weighted Average Exercise Price (in dollars per share)	$ 0.01
Forfeited, Amount of Options (in shares)
Forfeited, Weighted Average Exercise Price (in dollars per share)
Balance, Amount of Options (in shares)	317,460
Balance, Weighted Average Exercise Price (in dollars per share)	$ 0.01
Balance, Aggregate Intrinsic Value	$ 203
Exercisable, Amount of Options (in shares)
Exercisable, Weighted Average Exercise Price (in dollars per share)
Exercisable, Weighted Average remaining Contractual Term (Year)
Exercisable, Aggregate Intrinsic Value