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Note 11 - Share Based Compensation and Employee Benefit Plans - Non-vested Options (Details) - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Non-vested balance (in shares)	2,712,147
Non-vested, weighted average grant date fair value (in dollars per share)	$ 8.07
Granted (in shares)	753,600
Weighted-average fair value of stock options granted (in dollars per share)	$ 6.36	$ 8.37	$ 10.31
Vested (in shares)	(675,490)
Vested, weighted average grant date fair value (in dollars per share)	$ 6.69
Forfeited (in shares)	(52,500)
Forfeited, weighted average grant date fair value (in dollars per share)	$ 7.91
Non-vested balance (in shares)	2,737,757	2,712,147
Non-vested, weighted average grant date fair value (in dollars per share)	$ 7.95	$ 8.07

X

- Definition

Gross number of share options (or share units) granted during the period.

+ References

No definition available.

+ Details

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X

- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

+ 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 (d)(1)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

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X

- Definition

Number of non-vested options outstanding.

+ References

No definition available.

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X

- Definition

Number of non-vested options forfeited.

+ References

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X

- Definition

Weighted average grant-date fair value of non-vested options forfeited.

+ References

No definition available.

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X

- Definition

Weighted average grant-date fair value of non-vested options outstanding.

+ References

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- Definition

Number of options vested.

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- Definition

Weighted average grant-date fair value of options vested.

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