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Note 10 - Term Loans and Line of Credit Agreements (Details Textual) |  |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Dec. 20, 2019 USD ($) | May 31, 2018 USD ($) | Mar. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Jun. 30, 2020 USD ($) | Mar. 31, 2020 USD ($) | Dec. 31, 2020 USD ($)
Long-term Debt, Gross |  |  | $ 22,549,000 | $ 23,908,000 |  |  | $ 23,908,000
Debt Issuance Costs, Net, Total |  |  | $ 363,000 | 373,000 |  |  | 373,000
Long-term Debt, Weighted Average Interest Rate, over Time |  |  | 4.80% |  |  | 5.00% |
New Term Loan Agreement [Member] | Laurel Capital Corporation [Member] |  |  |  |  |  |  |
Long-term Debt, Gross | $ 23,000,000 |  |  |  |  |  |
Payments of Debt Issuance Costs | 300,000 |  |  |  |  |  |
Proceeds from Issuance of Debt | $ 7,200,000 |  |  |  |  |  |
Restricted Cash, Total |  |  | $ 3,400,000 | 3,900,000 |  |  | 3,900,000
Debt Instrument, Periodic Payment, Number of Payments | 119 |  |  |  |  |  |
Debt Instrument, Maturity Schedule (Year) | 15 years |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage, First Five Years | 5.00% |  |  |  |  |  |
Debt Instrument, Prepayment Penalty, Percentage, First Five Years | 5.00% |  |  |  |  |  |
Debt Instrument, Prepayment Penalty, Percentage, Years Six and Seven | 4.00% |  |  |  |  |  |
Debt Instrument, Prepayment Penalty, Percentage, Years Eight and Nine | 3.00% |  |  |  |  |  |
Debt Instrument, Prepayment Penalty, Percentage, Year Ten | 2.00% |  |  |  |  |  |
Debt Instrument, Covenant, Fixed Charge Coverage Ratio | 1.2 |  |  |  |  |  |
Debt Issuance Costs, Net, Total | $ 400,000 |  |  |  |  |  |
New Castle Country Club Commercial Mortgage [Member] | Mercer County State Bank [Member] |  |  |  |  |  |  |
Repayments of Debt | 13,800,000 |  |  |  |  |  |
The Line of Credit Agreement [Member] | Home Savings Bank [Member] |  |  |  |  |  |  |
Repayments of Lines of Credit | $ 1,700,000 |  |  |  |  |  |
Debt Instrument, Covenant, Fixed Charge Coverage Ratio |  |  | 1.2 |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  | $ 5,000,000 |  |  |  |  |
Line of Credit Facility, Amounts in Excess of, Subject to Borrowing Base |  | $ 1,000,000 |  |  |  |  |
Proceeds from Lines of Credit, Total |  |  | $ 0 |  |  |  | 0
Line of Credit Facility, Interest Rate at Period End |  |  | 3.50% |  |  |  |
The Line of Credit Agreement [Member] | Home Savings Bank [Member] | Prime Rate [Member] |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  | 0.25% |  |  |  |  |
Paycheck Protection Program CARES Act [Member] |  |  |  |  |  |  |
Long-term Debt, Gross |  |  | $ 878,000 | 1,964,000 |  |  | 1,964,000
Debt Issuance Costs, Net, Total |  |  |  |  |  |  |
Proceeds from Issuance of Long-term Debt, Total |  |  |  |  | $ 2,800,000 |  |
Debt Instrument, Decrease, Forgiveness |  |  | 1,100,000 | 800,000 |  |  |
Interest Forgiven |  |  | $ 8,000 | $ 4,000 |  |  |

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- Definition Under the line of credit facility, borrowings in excess of a specific amount are subject to a borrowing base which is calculated based off a specific level of eligible accounts receivable of the waste management business as defined in the agreement. + References No definition available. + Details
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