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Note 2 - Revenues (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Revenue from Contract with Customer, Including Assessed Tax	$ 32,728	$ 48,634
Transferred over Time [Member]
Revenue from Contract with Customer, Including Assessed Tax		$ 0
Contract with Customer, Asset, after Allowance for Credit Loss, Total	269
Transferred over Time [Member] | Gearing [Member]
Revenue from Contract with Customer, Including Assessed Tax	172
Transferred over Time [Member] | Heavy Fabrications [Member]
Revenue from Contract with Customer, Including Assessed Tax	$ 1,153

X

- Definition

Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time.

+ References

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