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Note 15 - Share-based Payments - Summary of Exercise Prices, Weighted Average Remaining Contractual Life and Intrinsic Values of Outstanding Options (Details) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Exercise price - lower limit (in dollars per share)	$ 1,054,677
Exercise price - upper limit (in dollars per share)	$ 60.04
Weighted average remaining contractual life, options outstanding (Year)	4 years 6 months
Weighted average exercise price per share, options outstanding (in dollars per share)	$ 224
Options exercisable, Number of shares (in shares)	533,395	470,317
Weighted average remaining contractual life, options exercisable (in dollars per share)	$ 61.51
Weighted average remaining contractual life, options exercisable (Year)	3 years 1 month 6 days
Aggregate intrinsic value, options exercisable	$ 224
Exercise Price Range 01 [Member]
Exercise price - lower limit (in dollars per share)	$ 13,750
Exercise price - upper limit (in dollars per share)	$ 21.10
Weighted average remaining contractual life, options outstanding (Year)	3 months 18 days
Weighted average exercise price per share, options outstanding (in dollars per share)	$ 224
Options exercisable, Number of shares (in shares)	13,750
Weighted average remaining contractual life, options exercisable (in dollars per share)	$ 21.10
Weighted average remaining contractual life, options exercisable (Year)	3 months 18 days
Aggregate intrinsic value, options exercisable	$ 224
Exercise Price Range 02 [Member]
Exercise price - lower limit (in dollars per share)	$ 245,230
Exercise price - upper limit (in dollars per share)	$ 42.39
Weighted average remaining contractual life, options outstanding (Year)	6 years 4 months 24 days
Weighted average exercise price per share, options outstanding (in dollars per share)	$ 0
Options exercisable, Number of shares (in shares)	7,000
Weighted average remaining contractual life, options exercisable (in dollars per share)	$ 47.29
Weighted average remaining contractual life, options exercisable (Year)	2 years 3 months 18 days
Aggregate intrinsic value, options exercisable	$ 0
Exercise Price Range 03 [Member]
Exercise price - lower limit (in dollars per share)	$ 199,883
Exercise price - upper limit (in dollars per share)	$ 55.72
Weighted average remaining contractual life, options outstanding (Year)	2 years
Weighted average exercise price per share, options outstanding (in dollars per share)	$ 0
Options exercisable, Number of shares (in shares)	194,333
Weighted average remaining contractual life, options exercisable (in dollars per share)	$ 55.72
Weighted average remaining contractual life, options exercisable (Year)	1 year 10 months 24 days
Aggregate intrinsic value, options exercisable	$ 0
Exercise Price Range 04 [Member]
Exercise price - lower limit (in dollars per share)	$ 321,827
Exercise price - upper limit (in dollars per share)	$ 62.06
Weighted average remaining contractual life, options outstanding (Year)	3 years 9 months 18 days
Weighted average exercise price per share, options outstanding (in dollars per share)	$ 0
Options exercisable, Number of shares (in shares)	225,394
Weighted average remaining contractual life, options exercisable (in dollars per share)	$ 62.66
Weighted average remaining contractual life, options exercisable (Year)	3 years 7 months 6 days
Aggregate intrinsic value, options exercisable	$ 0
Exercise Price Range 05 [Member]
Exercise price - lower limit (in dollars per share)	$ 257,487
Exercise price - upper limit (in dollars per share)	$ 78.41
Weighted average remaining contractual life, options outstanding (Year)	5 years 6 months
Weighted average exercise price per share, options outstanding (in dollars per share)	$ 0
Options exercisable, Number of shares (in shares)	89,168
Weighted average remaining contractual life, options exercisable (in dollars per share)	$ 77.75
Weighted average remaining contractual life, options exercisable (Year)	5 years 1 month 6 days
Aggregate intrinsic value, options exercisable	$ 0
Exercise Price Range 06 [Member]
Exercise price - lower limit (in dollars per share)	$ 16,500
Exercise price - upper limit (in dollars per share)	$ 81.27
Weighted average remaining contractual life, options outstanding (Year)	6 years
Weighted average exercise price per share, options outstanding (in dollars per share)	$ 0
Options exercisable, Number of shares (in shares)	3,750
Weighted average remaining contractual life, options exercisable (in dollars per share)	$ 82.07
Weighted average remaining contractual life, options exercisable (Year)	6 years 1 month 6 days
Aggregate intrinsic value, options exercisable	$ 0

X

- Definition

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iii)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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X

- Definition

The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

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- Definition

The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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- Definition

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- Definition

Weighted average remaining contractual term of exercisable stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

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