Note 2 - Summary of Significant Accounting Policies (Details Textual) - USD ($)							1 Months Ended	12 Months Ended
	Mar. 23, 2022	Jul. 02, 2021	Jun. 30, 2021	Jun. 29, 2021	Jun. 07, 2021	May 18, 2021	May 31, 2017	Dec. 31, 2021	Dec. 31, 2020	Jul. 01, 2021	Jul. 31, 2020	Jul. 31, 2019	May 31, 1988
Net Income (Loss) Attributable to Parent, Total								$ (31,249,000)	$ (37,817,000)
Working Capital								10,700,000
Net Cash Provided by (Used in) Operating Activities, Total								(15,274,000)	(13,428,000)
Gain (Loss) on Extinguishment of Debt, Total								(1,399,000)	(12,394,000)
Proceeds from Issuance of Common Stock								32,459,000	14,767,000
Payments to Acquire Property, Plant, and Equipment, Total								22,908,000	5,729,000
Repayments of Long-term Debt, Total								77,595,000	43,000
Deposits, Segregated Account, Pre-fund Eight Quarterly Dividend Payments		$ 10,200,000
Share-based Payment Arrangement, Expense								$ 4,747,000	$ 2,096,000
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)									0
Weighted Average Number Diluted Shares Outstanding Adjustment, Total (in shares)								3,000,000	2,956,000
Goodwill, Ending Balance								$ 3,813,000	$ 3,813,000				$ 7,006,000
Goodwill Amortized Portion									3,193,000
Goodwill, Impairment Loss								0
Debt Issuance Costs, Net, Total								2,300,000	800,000
Impairment of Intangible Assets, Finite-lived								0
Equity Method Investments								976,000	1,354,000
Income (Loss) from Equity Method Investments, Total								(942,000)	(2,169,000)
Interest Payments in Stock								2,600,000
Debt Instrument, Extension Option Fee Percentage						1.00%
Dividends Payable, Current								1,288,000	0
Accrual for Property and Equipment Received, Current								196,000
Income Taxes Paid								10,000	7,000
General and Administrative Expense [Member]
Share-based Payment Arrangement, Expense								$ 4,700,000	2,100,000
Subsequent Event [Member]
Stock Issued During Period, Shares, New Issues (in shares)	6,857,140
Shares Issued, Price Per Share (in dollars per share)	$ 1.75
Proceeds from Issuance of Common Stock	$ 11,800,000
Proceeds from Issuance of Common Stock, Gross	$ 12,000,000
Senior Secured Debt [Member]
Debt Instrument, Face Amount							$ 60,000,000
Debt Instrument, Additional Amount after Refinance							15,000,000
Repayments of Long-term Debt, Total		77,500,000
Debt Instrument, Extension Option Fee Percentage						1.00%
Prior Senior Secured Debt [Member]
Extinguishment of Debt, Amount							$ 45,000,000
New Loan [Member]
Debt Instrument, Face Amount		$ 50,000,000
Depository Shares [Member]
Stock Issued During Period, Shares, New Issues (in shares)				2,000,000
Preferred Stock, Shares Per Depository Share (in dollars per share)				$ 0.001
Preferred Stock, Liquidation Preference Per Share (in dollars per share)		$ 25.00		25.00						$ 25.00
Series A Preferred Stock [Member]
Preferred Stock, Liquidation Preference Per Share (in dollars per share)				$ 25,000.00
Proceeds From Issuance of Preferred Stock, Net of Issuance Costs		$ 54,000,000
Pipelines [Member]
Payments to Acquire Property, Plant, and Equipment, Total			$ 19,000,000
Land, Buildings and Improvements [Member] | Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)								45 years
Land, Buildings and Improvements [Member] | Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)								10 years
Machinery and Equipment [Member] | Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)								15 years
Machinery and Equipment [Member] | Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)								5 years
Lenders [Member]
Stock Issued During Period, Shares, Payment of Debt Extension Fees (in shares)						64,356
Apollo [Member]
Stock Issued During Period, Shares, New Issues (in shares)		299,210
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)		2,748,339
Proceeds From Issuance of Common Stock, Net of Issuance Costs		$ 29,200,000
Private Placement [Member] | Direct Offering [Member]
Stock Issued During Period, Shares, New Issues (in shares)					1,219,512
Shares Issued, Price Per Share (in dollars per share)					$ 12.30
Proceeds from Issuance of Common Stock					$ 15,000,000
Over-Allotment Option [Member] | Depository Shares [Member] | Maximum [Member]
Stock Issued During Period, Shares, New Issues (in shares)				300,000
SoCal Hemp JV LLC Lease Agreement [Member]
Equity Method Investment, Ownership Percentage								50.00%				50.00%
Equity Method Investments								$ 1,000,000.0	$ 1,400,000
Equity Method Investment, Contribution								800,000
Equity Method Investment, Repayment								(200,000)
Income (Loss) from Equity Method Investments, Total								$ (1,000,000.0)