Note 3 - Revenues From Contracts With Customers; Other Revenues (Tables)

6 Months Ended

Jun. 30, 2019

Notes Tables

Disaggregation of Revenue [Table Text Block]

	Three Months Ended June 30 , 2019
Major Goods/Service Line	Revenues from Contracts with Customers		Other Revenues		Total
Ethanol sales and related products, net	$	4,966	$	—	$	4,966
Hydrocarbon revenue		92		—		92
Grant and other revenue		—		28		28
	$	5,058	$	28	$	5,086
Timing of Revenue Recognition
Goods transferred at a point in time	$	5,058	$	—	$	5,058
Services transferred over time		—		28		28
	$	5,058	$	28	$	5,086

	Three Months Ended June 30 , 2018
Major Goods/Service Line	Revenues from Contracts with Customers		Other Revenues		Total
Ethanol sales and related products, net	$	8,813	$	—	$	8,813
Hydrocarbon revenue		607		—		607
Grant and other revenue		—		—		—
	$	9,420	$	—	$	9,420
Timing of Revenue Recognition
Goods transferred at a point in time	$	9,420	$	—	$	9,420
Services transferred over time		—		—		—
	$	9,420	$	—	$	9,420

	Six Months Ended June 30, 2019
Major Goods/Service Line	Revenues from Contracts with Customers		Other Revenues		Total
Ethanol sales and related products, net	$	10,630	$	—	$	10,630
Hydrocarbon revenue		831		—		831
Grant and other revenue		—		28		28
	$	11,461	$	28	$	11,489
Timing of Revenue Recognition
Goods transferred at a point in time	$	11,461	$	—	$	11,461
Services transferred over time		—		28		28
	$	11,461	$	28	$	11,489

	Six Months Ended June 30, 2018
Major Goods/Service Line	Revenues from Contracts with Customers		Other Revenues		Total
Ethanol sales and related products, net	$	17,031		—	$	17,031
Hydrocarbon revenue		607		—		607
Grant and other revenue		25		—		25
	$	17,663	$	—	$	17,663
Timing of Revenue Recognition
Goods transferred at a point in time	$	17,638	$	—	$	17,638
Services transferred over time		25		—		25
	$	17,663	$	—	$	17,663