Note 15 - Fair Value Measurements and Fair Value of Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2018

Notes Tables

Fair Value Measurements, Recurring and Nonrecurring [Table Text Block]

			Fair Value Measurements at December 31, 2018 (In thousands)
	Fair Value at December 31, 2018		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Recurring:
Derivative Warrant Liability	$	22	$	-	$	-	$	22
2020 Notes Embedded Derivative Liability		394		-		-		394
Total Recurring Fair Value Measurements	$	416	$	-	$	-	$	416
Nonrecurring
Corn and finished goods inventory	$	1,047	$	29	$	1,018	$	-
	$	1,047	$	29	$	1,018	$	-

			Fair Value Measurements at December 31, 2017 (In thousands)
	Fair Value at December 31, 2017		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Recurring:
Derivative Warrant Liability	$	1,951	$	-	$	-	$	1,951
2020 Notes Embedded Derivative Liability		5,224		-		-		5,224
Total Recurring Fair Value Measurements	$	7,175	$	-	$	-	$	7,175
Nonrecurring
Corn and finished goods inventory	$	1,916	$	189	$	1,727	$	-
	$	1,916	$	189	$	1,727	$	-

Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

	Fair Value Measurements Using Significant Unobservable Inputs (Level 3) (in thousands)
	Derivative Warrant Liability			2020 Embedded Derivative Liability
Opening Balance	$	1,951		$	5,224
Transfers into Level 3		–			–
Transfers out of Level 3		–			–
Total (gains) or losses for the period
Included in earnings		2,976			(2,637	)
Included in other comprehensive income		–			–
Purchases, issues, sales and settlements
Purchases		–			–
Issues		–			–
Sales		–			–
Settlements		(4,905	)		(2,193	)
Closing balance	$	22		$	394