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Note 7 - Loan Payable - Schedule of Standby Fees Based on Total Funded Debt to EBITDA Ratio (Details)	3 Months Ended
	Mar. 31, 2022
Debt to EBITDA is Less Than 2.00 [Member]
Standby fees	0.35%
Debt to EBITDA is Greater Than or Equal to 2.00 and Less Than 2.50 [Member]
Standby fees	0.45%
Debt to EBITDA is Greater Than or Equal to 2.50 and Less Than 3.00 [Member]
Standby fees	0.50%
Debt to EBITDA is Greater Than or Equal to 3.00 and Less Than 3.50 [Member]
Standby fees	0.55%
Debt to EBITDA is Greater Than or Equal to 3.50 and Less Than 4.00 [Member]
Standby fees	0.60%
Debt to EBITDA is Greater Than or Equal to 4.00 [Member]
Standby fees	0.65%
Bank of Montreal and Royal Bank of Canada [Member] | London Interbank Offered Rate (LIBOR) [Member] | Debt to EBITDA is Less Than 2.00 [Member]
Basis Spread on Variable Rate	1.75%
Bank of Montreal and Royal Bank of Canada [Member] | London Interbank Offered Rate (LIBOR) [Member] | Debt to EBITDA is Greater Than or Equal to 2.00 and Less Than 2.50 [Member]
Basis Spread on Variable Rate	2.25%
Bank of Montreal and Royal Bank of Canada [Member] | London Interbank Offered Rate (LIBOR) [Member] | Debt to EBITDA is Greater Than or Equal to 2.50 and Less Than 3.00 [Member]
Basis Spread on Variable Rate	2.50%
Bank of Montreal and Royal Bank of Canada [Member] | London Interbank Offered Rate (LIBOR) [Member] | Debt to EBITDA is Greater Than or Equal to 3.00 and Less Than 3.50 [Member]
Basis Spread on Variable Rate	2.75%
Bank of Montreal and Royal Bank of Canada [Member] | London Interbank Offered Rate (LIBOR) [Member] | Debt to EBITDA is Greater Than or Equal to 3.50 and Less Than 4.00 [Member]
Basis Spread on Variable Rate	3.00%
Bank of Montreal and Royal Bank of Canada [Member] | London Interbank Offered Rate (LIBOR) [Member] | Debt to EBITDA is Greater Than or Equal to 4.00 [Member]
Basis Spread on Variable Rate	3.25%
Bank of Montreal and Royal Bank of Canada [Member] | Base Rate [Member] | Debt to EBITDA is Less Than 2.00 [Member]
Basis Spread on Variable Rate	0.50%
Bank of Montreal and Royal Bank of Canada [Member] | Base Rate [Member] | Debt to EBITDA is Greater Than or Equal to 2.00 and Less Than 2.50 [Member]
Basis Spread on Variable Rate	1.00%
Bank of Montreal and Royal Bank of Canada [Member] | Base Rate [Member] | Debt to EBITDA is Greater Than or Equal to 2.50 and Less Than 3.00 [Member]
Basis Spread on Variable Rate	1.25%
Bank of Montreal and Royal Bank of Canada [Member] | Base Rate [Member] | Debt to EBITDA is Greater Than or Equal to 3.00 and Less Than 3.50 [Member]
Basis Spread on Variable Rate	1.50%
Bank of Montreal and Royal Bank of Canada [Member] | Base Rate [Member] | Debt to EBITDA is Greater Than or Equal to 3.50 and Less Than 4.00 [Member]
Basis Spread on Variable Rate	1.75%
Bank of Montreal and Royal Bank of Canada [Member] | Base Rate [Member] | Debt to EBITDA is Greater Than or Equal to 4.00 [Member]
Basis Spread on Variable Rate	2.00%

X

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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X

- Details

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X

- Details

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- Details

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- Details

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X

- Details

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X

- Details

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Data Type:	na
Balance Type:
Period Type:

X

- Details

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X

- Details

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- Details

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