Note 9 - Debt (Tables)

3 Months Ended

Mar. 31, 2020

Notes Tables

Schedule of Debt [Table Text Block]

	Principal Amount of 2020 Notes			Principal Amount of 2020/21 Notes		Debt Discount			Debt Issue Costs			Total Notes		Embedded Derivative			Total
Balance - December 31, 2019	$	14,053		$	—	$	(123	)	$	(30	)	$	13,900	$	—		$	13,900
Amortization of debt discount		—			—		95			—			95		—			95
Amortization of debt issue costs		—			—		—			8			8		—			8
Paid-in-kind interest		47			—		—			—			47		—			47
Exchange of 2020 Notes for 2020/21 Notes		(14,100	)		14,100		—			—			—		—			—
Original issue discount paid with 2020/21 Notes		—			282		(282	)		—			—		—			—
Fair value of 2020/21 embedded derivative		—			—		—			—			—		2,848			2,848
Change in fair value of 2020/21 Notes embedded derivative		—			—		—			—			—		(2,748	)		(2,748	)
Balance - March 31, 2020	$	—		$	14,382	$	(310	)	$	(22	)	$	14,050	$	100		$	14,150

Schedule of Long-term Debt Instruments [Table Text Block]

	March 31, 2020			December 31, 2019
Equipment	$	318		$	321
Insurance		289			428
Total notes payable - other		607			749
Less current portion		(375	)		(516	)
Long-term portion	$	232		$	233

Schedule of Maturities of Long-term Debt [Table Text Block]

Year ending December 31,
2020 (remaining)	$	353
2021		89
2022		65
2023		65
2024 and thereafter		35
	$	607