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Note 11 - Stock Based Compensation and Other Plans - Restricted Stock Activity (Details) - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
The 2008 Plan [Member]
Granted shares (in shares)	3,044,927
The 2008 Plan [Member] | Restricted Stock [Member]
Unvested shares (in shares)		1,000
Weighted-Average Grant Date Fair Value per Share, Unvested (in dollars per share)		$ 1.36
Granted shares (in shares)	0	0
Weighted-Average Grant Date Fair Value per Share, Granted (in dollars per share)
Vested shares (in shares)		(1,000)
Weighted-Average Grant Date Fair Value per Share, Vested (in dollars per share)		$ 1.36
Forfeited shares (in shares)
Weighted-Average Grant Date Fair Value per Share, Forefeited (in dollars per share)
Unvested shares (in shares)
Weighted-Average Grant Date Fair Value per Share, Unvested (in dollars per share)
The 2018 Plan [Member]
Granted shares (in shares)	585,000
Unvested shares (in shares)	565,000
The 2018 Plan [Member] | Restricted Stock [Member]
Unvested shares (in shares)		10,000
Weighted-Average Grant Date Fair Value per Share, Unvested (in dollars per share)		$ 1.23
Granted shares (in shares)	0	0
Weighted-Average Grant Date Fair Value per Share, Granted (in dollars per share)
Vested shares (in shares)		(10,000)
Weighted-Average Grant Date Fair Value per Share, Vested (in dollars per share)		$ 1.23
Forfeited shares (in shares)
Weighted-Average Grant Date Fair Value per Share, Forefeited (in dollars per share)
Unvested shares (in shares)
Weighted-Average Grant Date Fair Value per Share, Unvested (in dollars per share)

X

- 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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X

- 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

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)(3)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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X

- 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

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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- 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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- 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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X

- 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
-Subparagraph (c)(2)(i)-(ii)
-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
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(2)
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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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-SubTopic 10
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