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Note 16 - Mezzanine Equity (Details Textual) - USD ($) $ / shares in Units, $ in Thousands |  |  |  |  | 3 Months Ended | 4 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 30, 2020 | Feb. 17, 2020 | Jun. 30, 2019 | Mar. 29, 2019 | Mar. 29, 2020 | Dec. 02, 2019 | Dec. 31, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Nov. 06, 2019
Adjustments to Additional Paid in Capital, Beneficial Conversion Feature of Convertible Preferred Stock |  |  |  |  |  |  |  | $ 1,067 | $ 9,339 |
Conversion of Series E Preferred Stock into Commmon Stock [Member] |  |  |  |  |  |  |  |  |  |
Convertible Preferred Stock, Conversion Price (in dollars per share) |  |  |  |  |  |  |  | $ 0.94 |  |
Conversion of Stock, Shares Converted (in shares) |  |  |  |  |  |  |  | 11,264 |  |
Conversion of Stock, Shares Issued (in shares) |  |  |  |  |  |  |  | 12,901,674 |  |
Series E Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |
Preferred Stock Dividends, Shares (in shares) |  |  |  |  |  |  |  | 900 |  |
Dividends, Preferred Stock, Cash |  |  |  |  |  |  | $ 1,621 | $ 864 |  |
Adjustments to Additional Paid in Capital, Beneficial Conversion Feature of Convertible Preferred Stock |  |  |  |  |  |  |  | 1,067 | 9,339 |
Preferred Stock Redeemed During Period, Shares (in shares) |  |  |  |  | 21,364 |  |  |  |  |
Preferred Stock Redeemed During Period, Value |  |  |  |  | $ 24,569 |  |  |  |  |
Temporary Equity, Accretion to Redemption Value |  |  |  |  |  |  |  | 2,253 | $ 4,227 |
Dividends, Preferred Stock, Total |  |  |  |  |  |  |  | 1,796 |  |
Dividends, Preferred Stock, Stock |  |  |  |  |  |  |  | $ 900 |  |
Series E Convertible Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |
Convertible Preferred Stock, Conversion Price, Percentage of VWAP |  |  |  |  |  |  |  |  |  | 80.00%
Family Trading Inc [Member] | Series E Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues (in shares) |  |  |  | 27,129 |  |  |  |  |  |
Shares Issued, Price Per Share (in dollars per share) |  |  |  | $ 1,000 |  |  |  |  |  |
Convertible Preferred Stock, Conversion Price (in dollars per share) |  |  |  | $ 500.00 |  |  |  |  |  |
Convertible Preferred Stock, Conversion Price, Percentage of VWAP |  |  |  | 80.00% |  |  |  |  |  |
Preferred Stock, Number of Common Shares Voting Rights (in shares) |  |  |  | 1,000 |  |  |  |  |  |
Preferred Stock, Liquidation Preference Per Share (in dollars per share) |  |  |  | $ 1,000 |  |  |  |  |  |
Preferred Stock Redemption Premium, Percent of Liquidation Amount Redeemed |  |  |  | 15.00% |  | 15.00% |  |  |  |
Preferred Stock, Dividend Rate, Percentage |  |  |  | 15.00% | 15.00% |  |  |  |  |
Preferred Stock, Accrued Dividend, Interest Rate |  |  |  | 15.00% | 20.00% |  |  |  |  |
Preferred Stock Dividends, Shares (in shares) |  |  | 1,029 |  |  |  |  |  |  |
Stock Redeemed or Called During Period, Shares (in shares) |  |  |  |  |  | 12,434 |  |  |  |
Stock Redeemed or Called During Period, Value |  |  |  |  |  | $ 14,302 |  |  |  |
Deemed Dividend on Temporary Equity Realized Redemptions |  |  |  |  |  | $ 1,868 |  |  |  |
Temporary Equity, Realized Redemptions on Deemed Dividends |  |  |  |  | $ 3,204 |  |  |  |  |
Family Trading Inc [Member] | Series E Preferred Stock [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |
Convertible Preferred Stock, Conversion Price (in dollars per share) |  |  |  | $ 0.60 |  |  |  |  |  |
Family Trading Inc [Member] | Series E Convertible Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, Purchase of Assets (in shares) |  | 16,004 |  |  |  |  |  |  |  |
Convertible Stock Issued, Settlement of Consideration |  | $ 14,350 |  |  |  |  |  |  |  |
Convertible Stock Issued, Settlement of Dividends |  | 1,621 |  |  |  |  |  |  |  |
Convertible Stock Issued, Settlement of Interest on Dividends |  | $ 32 |  |  |  |  |  |  |  |
Yorkville [Member] | Series B Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |
Preferred Stock Redemption Premium, Percent of Liquidation Amount Redeemed | 20.00% |  |  |  |  |  |  |  |  |

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