Note 1 - Nature of Business and Summary of Significant Accounting Policies - Summarized Financial Information on Equity Method Investments (Details) - Sekisui Fuller Company Ltd [Member] $ in Thousands	12 Months Ended
	Dec. 02, 2017 USD ($)
Current assets	$ 102,454
Non-current assets	27,732
Current liabilities	40,173
Non-current liabilities	1,583
Net revenue	171,302
Gross profit	50,607
Net income	$ 17,735