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Note 15 - Supplemental Cash Flow Information - Supplemental Cash Flow (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Interest paid	$ 151	$ 120
Federal, state, and local income taxes paid, net	4,669	5,327
Change in contract receivables, net	(424)	(2,144)
Change in contract liabilities, net	836	2,144
Property, plant, and equipment purchases in accounts payable	$ 2,316	$ 2,460

X

- Definition

The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.

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Amount of increase (decrease) in right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time.

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