Note 20 - Other Equity Transactions - Shares Issued Recorded In Expense Using Grant-date Fair Value (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2018 USD ($) shares
Shares issued, Total (in shares) | shares	122,750
Grant date fair value, Total | $	$ 329	[1],[2]
Issuance of Common Stock Pursuant to Royalty Agreement [Member] | James McKenzie, Related Party [Member]
Date of issuance, share-based compensation	July 2018
Shares issued, Royalty agreement (in shares) | shares	3,661
Grant date fair value, Royalty agreement | $	$ 9
Four Board Members [Member] | Issuance of Vested Restricted Common Stock for Director Compensation [Member]
Date of issuance, share-based compensation	January, April and July 2018
Shares issued, share-based compensation (in shares) | shares	50,971
Grant date fair value, share-based compensation | $	$ 137
Three Employees [Member] | Issuance of Common Stock for Bonues [Member]
Date of issuance, share-based compensation	January and July 2018
Shares issued, share-based compensation (in shares) | shares	68,118
Grant date fair value, share-based compensation | $	$ 183	[3]

[1] Excludes $24 thousand of stock compensation for stock issued in 2017 that was amortized from prepaid expense in 2018.

[2] Total excludes $5 thousand of stock compensation related to royalties that were recorded as expense but not issued and outstanding as of September 30, 2018 and includes $7 thousand of stock compensation related to 2017 royalties.

[3] Includes bonus of $163 thousand that was accrued and expensed in 2017.