Note H - Fair Value of Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2020

Notes Tables

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

	Balance as of September 30, 2020		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Deerfield Warrant liability	$	134	$	—	$	—	$	134
Embedded Warrant Put Option		19		—		—		19
Deerfield Note Put Option		—		—		—		—
KVK Warrant liability		31		—		31		—
Total liabilities	$	184	$	—	$	31	$	153

	Balance as of December 31, 2019		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Deerfield Warrant liability	$	77	$	—	$	—	$	77
Embedded Warrant Put Option		19		—		—		19
Deerfield Note Put Option		—		—		—		—
Fundamental change and make-whole interest provisions embedded within 2021 Notes		—		—		—		—
KVK Warrant liability		24		—		24		—
Total liabilities	$	120	$	—	$	24	$	96

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

	Three months ended September 30,					Nine months ended September 30,
	2020		2019			2020		2019
Balance as of beginning of period	$	38	$	1,437		$	96	$	1,845
Adjustment to fair value		115		(1,168	)		57		(1,576	)
Balance as of end of period	$	153	$	269		$	153	$	269