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Note 12 - Equity-based Compensation - Restricted Stock (Details) - Restricted Stock and Restricted Stock Units [Member]	9 Months Ended
	Sep. 30, 2021 $ / shares shares
Unvested, restricted stock (in shares) | shares	34,944
Unvested, restricted stock, weighted avergae grant date fair value (in dollars per share) | $ / shares	$ 1,037.83
Granted, restricted stock (in shares) | shares	11,983
Granted, restricted stock, weighted avergae grant date fair value (in dollars per share) | $ / shares	$ 2,157.55
Forfeited, restricted stock (in shares) | shares	(1,328)
Forfeited, restricted stock, weighted average grant date fair value (in dollars per share) | $ / shares	$ 1,404.28
Vested and issued, restricted stock (in shares) | shares	(11,241)
Vested and issued, restricted stock, weighted average grant date fair value (in dollars per share) | $ / shares	$ 866.89
Unvested, restricted stock (in shares) | shares	34,358
Unvested, restricted stock, weighted avergae grant date fair value (in dollars per share) | $ / shares	$ 1,470.12
Vested and unissued, restricted stock (in shares) | shares	5,978
Vested and unissued, restricted stock, weighted average grant date fair value (in dollars per share) | $ / shares	$ 756.32

X

- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested but are still unissued during the reporting period.

+ References

No definition available.

+ Details

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X

- Definition

Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that are vested but unissued.

+ References

No definition available.

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(3)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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- Definition

Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(3)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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X

- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(i)-(ii)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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- Definition

Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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- Definition

The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

+ References

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