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Note 2 - Summary of Significant Accounting Policies (Details Textual) - USD ($) |  | 3 Months Ended |  |
--- | --- | --- | --- | ---
Jul. 01, 2018 | Mar. 31, 2020 | Dec. 31, 2019 | Jul. 01, 2019
Operating Lease, Right-of-Use Asset |  |  | $ 9,504,000 |
Operating Lease, Liability, Total |  |  | $ 10,247,000 |
Graphics Manufacturing Facility in North Canton, Ohio [Member] | Forecast [Member] |  |  |  |
Proceeds from Divestiture of Businesses |  | $ 8,000,000 |  |
Accounting Standards Update 2014-09 [Member] |  |  |  |
Cumulative Effect on Retained Earnings, Net of Tax, Total | $ 591,000 |  |  |
Accounting Standards Update 2016-02 [Member] |  |  |  |
Operating Lease, Right-of-Use Asset |  |  |  | $ 10,400,000
Operating Lease, Liability, Total |  |  |  | $ 10,800,000

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