Note 20 - Stock Options (Details Textual) - USD ($)			1 Months Ended		6 Months Ended		12 Months Ended
	Sep. 24, 2017	Sep. 24, 2007	Dec. 31, 2020	Sep. 30, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Payments					$ 0
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term (Year)					2 years 6 months
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate					0.14%	0.11%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate					45.38%	45.38%
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term (Year)					3 years 3 months
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate					2.35%	2.35%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate					76.85%	55.59%
Employee Stock Option Plan 2007 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)		600,000			0	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (in shares)					0	0
Share-based Payment Arrangement, Expense					$ 0	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number (in shares)			77,500		37,500	77,500	37,500
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Exercise Price (in dollars per share)			$ 3.69		$ 4.14	$ 3.69	$ 4.14
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term (Year)					2 months 26 days	8 months 15 days
Director Plan 2007 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)	500,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (in shares)					0	50,000
Share-based Payment Arrangement, Expense					$ 0	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number (in shares)			200,000		50,000	200,000	50,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Exercise Price (in dollars per share)			$ 3.48		$ 4.14	$ 3.48	$ 4.14
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term (Year)					2 months 26 days	5 months 19 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures, Total (in shares)					0	0
Employee Stock Option Plan 2017 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)					11,000	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term (Year)					5 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (in shares)					41,125	0
Share-based Payment Arrangement, Expense					$ 10	$ 10
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number (in shares)			104,750		130,375	104,750	130,375
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Exercise Price (in dollars per share)			$ 4.40		$ 4.79	$ 4.40	$ 4.79
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term (Year)					2 years	2 years 11 months 15 days
Employee Stock Option Plan 2017 [Member] | Share-based Payment Arrangement, Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage					25.00%
Employee Stock Option Plan 2017 [Member] | Minimum [Member]
Stock Issued During Period, Shares, New Issues (in shares)							300,000
Employee Stock Option Plan 2017 [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)					300,000
Stock Issued During Period, Shares, New Issues (in shares)							600,000
Director Plan 2017 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)					0	0
Stock Issued During Period, Shares, New Issues (in shares)			600,000	300,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (in shares)					0	0
Share-based Payment Arrangement, Expense					$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number (in shares)			240,000		320,000	240,000	320,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Exercise Price (in dollars per share)			$ 3.93		$ 4.27	$ 3.93	$ 4.27
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term (Year)					2 years 8 months 19 days	3 years 2 months 26 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term (Year)				5 years
Director Plan 2017 [Member] | Unvested Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)					0	0