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Note 20 - Subsequent Events (Details Textual) $ in Thousands			2 Months Ended	12 Months Ended
	Jan. 01, 2020 USD ($) shares	Oct. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)	Feb. 13, 2020 USD ($) shares	Feb. 12, 2020 USD ($) shares	Dec. 31, 2019 USD ($) shares	Dec. 31, 2018 USD ($) shares	Dec. 31, 2017 USD ($) shares	Feb. 13, 2019 USD ($)
Stock Repurchased and Retired During Period, Shares | shares						101,816
Stock Repurchased and Retired During Period, Value						$ 4,986
Royal Bank, Bank of Montreal, Bank of Nova Scotia, HSBC and CIBC [Member]
Total Funded Debt to EBITDA Ratio			2			2
Stock Buyback Program 2019 [Member]
Stock Repurchase Program, Authorized Amount									$ 40,000
Subsequent Event [Member] | Stock Buyback Program 2020 [Member]
Stock Repurchase Program, Authorized Amount					$ 40,000
Subsequent Event [Member] | Stock Buyback Program 2019 [Member]
Stock Repurchased and Retired During Period, Shares | shares				101,816	101,816
Stock Repurchased and Retired During Period, Value				$ 5,000	$ 5,000
Cedar Holdings Group, Incorporated [Member]
Business Combination, Consideration Transferred, Total		$ 14,100
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Consideration Transferred			$ 100
Cedar Holdings Group, Incorporated [Member] | Subsequent Event [Member]
Business Combination, Consideration Transferred, Total	$ 13,966
Payments to Acquire Businesses, Gross	$ 8,901
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares | shares	32,374
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable	$ 2,000
Business Acquisition, Equity Interest Issued or Issuable, Shares, Restriction Period	2 years
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High	$ 4,000
Business Combination, Contingent Consideration, Liability, Total	$ 3,065
Cedar Holdings Group, Incorporated [Member] | Subsequent Event [Member] | Measurement Input, Discount Rate [Member]
Business Combination, Contingent Consideration, Liability, Measurement Input	11.3

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The period of time in which equity interests issued or issuable in a business acquisition are subject to restrictions.

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