Note 13 - Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2020

Notes Tables

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

			Fair Value Measurements at June 30, 2020 (In thousands)
	Fair Value at June 30, 2020		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	$	—	$	—	$	—	$	—
2020/21 Notes Embedded Derivative Liability		276		—		—		276
Total Recurring Fair Value Measurements	$	276	$	—	$	—	$	276
Nonrecurring
Corn and finished goods inventory	$	554	$	13	$	541	$	—

			Fair Value Measurements at December 31, 2019 (In thousands)
	Fair Value at December 31, 2019		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	$	8	$	—	$	—	$	8
Nonrecurring
Corn and finished goods inventory	$	940	$	267	$	673	$	—

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

	Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
	Derivative Warrant Liability			2020/21 Notes Embedded Derivative
Balance, December 31, 2019	$	8		$	—
Issue of 2020/21 Notes embedded derivative liability		—			2,848
Total (gains) included in earnings		(8	)		(2,572	)
Balance, June 30, 2020	$	—		$	276