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

12 Months Ended

Dec. 31, 2019

Notes Tables

Disaggregation of Revenue [Table Text Block]

	Year Ended December 31, 201 9
Major Goods/Service Line	Revenues from Contracts with Customers		Other Revenues		Total
Ethanol sales and related products, net	$	22,115	$	—	$	22,115
Hydrocarbon revenue		2,338		—		2,338
Grant and other revenue		—		34		34
	$	24,453	$	34	$	24,487
Timing of Revenue Recognition
Goods transferred at a point in time	$	24,453	$	—	$	24,453
Services transferred over time		—		34		34
	$	24,453	$	34	$	24,487

	Year Ended December 31, 201 8
Major Goods/Service Line	Revenues from Contracts with Customers		Other Revenues		Total
Ethanol sales and related products, net	$	31,641	$	—	$	31,641
Hydrocarbon revenue		1,197		—		1,197
Grant and other revenue		25		—		25
	$	32,863	$	—	$	32,863
Timing of Revenue Recognition
Goods transferred at a point in time	$	32,838	$	—	$	32,838
Services transferred over time		25		—		25
	$	32,863	$	—	$	32,863