Note 6 - Debt - Summary of Debt (Details) (Parentheticals) - USD ($) $ in Thousands |
Dec. 31, 2019 |
Dec. 31, 2018 |
Nov. 05, 2018 |
|---|---|---|---|
| Related Party July 2018 Note Payable To Great Harbor LLC [Member] | |||
| Debt instrument, unamortized discount | $ 563 | $ 1,056 | |
| Related Party November 2018 Note Payable To Great Harbor LLC [Member] | |||
| Debt instrument, unamortized discount | 354 | 1,088 | $ 1,214 |
| Related Party Debt November 2014 Note Payable to Golisano Holdings LLC (Formerly Penta Mezzanine SBIC Fund I, L.P.) [Member] | |||
| Debt instrument, unamortized discount | 271 | 678 | |
| Related-Party Debt January 2015 Note Payable to Golisano Holdings LLC (Formerly Payable to JL-BBNC Mezz Utah, LLC) [Member] | |||
| Debt instrument, unamortized discount | 457 | 915 | |
| February 2015 Note Payable to Golisano Holdings LLC (Formerly Payable to Penta Mezzanine SBIC Fund I, L.P.) [Member] | |||
| Debt instrument, unamortized discount | $ 25 | $ 60 |