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Note 2 - Summary of Significant Accounting Policies (Details Textual) - USD ($) |  |  | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 05, 2020 | May 25, 2017 | May 31, 2017 | Mar. 31, 2020 | Dec. 31, 2020 | Dec. 31, 2020 | Dec. 31, 2019 | Jul. 31, 2020 | Jul. 31, 2019 | Nov. 30, 2018 | May 31, 1988
Net Income (Loss) Attributable to Parent, Total |  |  |  |  |  | $ (37,817,000) | $ (29,528,000) |  |  |  |
Working Capital |  |  |  |  | $ 4,900,000 | 4,900,000 |  |  |  |  |
Net Cash Provided by (Used in) Operating Activities, Total |  |  |  |  |  | (13,428,000) | (13,708,000) |  |  |  |
Proceeds from Issuance of Common Stock |  |  |  |  |  | 14,767,000 | 19,395,000 |  |  |  |
Required Payment to Acquire Property Available for Purchase, Due End of Fiscal Year |  |  |  |  | 19,000,000 | 19,000,000 |  |  |  |  |
Share-based Payment Arrangement, Expense |  |  |  |  |  | $ 2,096,000 | $ 562,000 |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) |  |  |  |  |  | 0 |  |  |  |  |
Weighted Average Number Diluted Shares Outstanding Adjustment, Total (in shares) |  |  |  |  |  | 2,956,081 | 11,477,000 |  |  |  |
Goodwill, Ending Balance |  |  |  |  | 3,813,000 | $ 3,813,000 | $ 3,813,000 |  |  |  | $ 7,006,000
Goodwill Amortized Portion |  |  |  |  |  | 3,193,000 |  |  |  |  |
Goodwill, Impairment Loss |  |  |  |  |  | 0 |  |  |  |  |
Equity Method Investments |  |  |  |  | $ 1,354,000 | 1,354,000 | 729,000 |  |  |  |
Income (Loss) from Equity Method Investments, Total |  |  |  |  |  | $ (2,169,000) | (490,000) |  |  |  |
Percentage of Future Quarterly Interest Payments |  |  |  |  | 25.00% | 25.00% |  |  |  |  |
Interest Payments in Stock |  |  |  |  |  | $ 1,460,000 |  |  |  |  |
Income Taxes Paid |  |  |  |  |  | $ 7,000 | 6,000 |  |  |  |
Conversion of Series 1 Preferred Stock in to Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |
Conversion of Stock, Shares Converted (in shares) |  |  |  |  |  | 2,469 |  |  |  |  |
Conversion of Stock, Shares Issued (in shares) |  |  |  |  |  | 1,000,068 |  |  |  |  |
Conversion of Convertible Senior Notes 2020 into Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Conversion, Original Debt, Amount | $ 17,500,000 |  |  |  |  | $ 38,900,000 |  |  |  |  |
Debt Conversion, Converted Instrument, Shares Issued (in shares) | 2,600,000 |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, Conversion of Convertible Securities (in shares) |  |  |  |  |  | 5,766,337 |  |  |  |  |
Conversion of Convertible Senior Notes into Series-1 Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Conversion, Original Debt, Amount |  |  |  |  |  | $ 27,300,000 |  |  |  |  |
Debt Conversion, Converted Instrument, Shares Issued (in shares) |  |  |  |  |  | 10,000 |  |  |  |  |
Stage 1 Loan [Member] |  |  |  |  |  |  |  |  |  |  |
Note Receivable, Interest Rate |  |  |  |  |  |  |  |  | 8.00% |  |
Financing Receivable, after Allowance for Credit Loss, Total |  |  |  |  |  |  |  |  | $ 190,000 |  |
SoCal Hemp JV LLC Lease Agreement [Member] |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  |  |  |  |  |  | 50.00% |  |
Equity Method Investments |  |  |  |  | $ 1,400,000 | $ 1,400,000 | 700,000 |  |  |  |
Equity Method Investment, Contribution |  |  |  |  |  | 2,800,000 |  |  |  |  |
Income (Loss) from Equity Method Investments, Total |  |  |  |  |  | $ (2,200,000) |  |  |  |  |
Land, Buildings and Improvements [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment, Useful Life (Year) |  |  |  |  |  | 10 years |  |  |  |  |
Land, Buildings and Improvements [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment, Useful Life (Year) |  |  |  |  |  | 45 years |  |  |  |  |
Machinery and Equipment [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment, Useful Life (Year) |  |  |  |  |  | 5 years |  |  |  |  |
Machinery and Equipment [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment, Useful Life (Year) |  |  |  |  |  | 15 years |  |  |  |  |
General and Administrative Expense [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Payment Arrangement, Expense |  |  |  |  |  | $ 2,100,000 | $ 600,000 |  |  |  |
Senior Secured Debt [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  | $ 60,000,000 |  |  |  |  |  |  |  |
Debt Instrument, Additional Amount after Refinance |  | $ 15,000,000 | 15,000,000 |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 7.00% |  |  |  |  |  |  |  |  |
Prior Senior Secured Debt [Member] |  |  |  |  |  |  |  |  |  |  |
Extinguishment of Debt, Amount |  | $ 45,000,000 | $ 45,000,000 |  |  |  |  |  |  |  |
2020 Convertible Senior Notes [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount | $ 27,400,000 |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 7.00% |  |  |  |  |  |  |  |  |  |
Debt Conversion, Original Debt, Amount | $ 27,300,000 |  |  |  |  |  |  |  |  |  |
Debt Conversion, Converted Instrument, Shares Issued (in shares) | 10,000 |  |  |  |  |  |  |  |  |  |
Conversion of Convertible Senior Notes 2020 into Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Conversion, Original Debt, Amount | $ 17,500,000 |  |  |  |  |  |  |  |  |  |
Debt Conversion, Converted Instrument, Shares Issued (in shares) | 2,600,000 |  |  |  |  |  |  |  |  |  |
July 2020 ATM Offering [Member] |  |  |  |  |  |  |  |  |  |  |
At Market Issuance Sales Agreement, Maximum Aggregate Offering Price |  |  |  |  |  |  |  | $ 30,000,000 |  |  |
Stock Issued During Period, Shares, New Issues (in shares) |  |  |  |  | 1,099,021 |  |  |  |  |  |
Proceeds from Issuance of Common Stock, Gross |  |  |  |  | $ 11,200,000 |  |  |  |  |  |
Proceeds from Issuance of Common Stock |  |  |  |  | $ 10,800,000 |  |  |  |  |  |
At Market Issuance Sales Agreement [Member] |  |  |  |  |  |  |  |  |  |  |
At Market Issuance Sales Agreement, Maximum Aggregate Offering Price |  |  |  |  |  |  |  |  |  | $ 25,000,000 |
Stock Issued During Period, Shares, New Issues (in shares) |  |  |  | 2,369,170 |  |  |  |  |  |  |
Proceeds from Issuance of Common Stock, Gross |  |  |  | $ 25,000,000 |  |  |  |  |  |  |
Proceeds from Issuance of Common Stock |  |  |  | $ 24,200,000 |  |  |  |  |  |  |
SoCal Hemp JV LLC Lease Agreement [Member] |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  |  | 50.00% | 50.00% |  |  |  |  |

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