Note 5 - Debt - Components of Debt (Details) - USD ($) $ in Thousands		Dec. 31, 2019		Oct. 11, 2019	May 31, 2019	May 30, 2019	Dec. 31, 2018		Oct. 12, 2016
Principal		$ 105,869					$ 80,691
Carrying amount		104,435					76,820
Fair value		105,852					87,857
The 2017 Senior Credit Facility [Member]
Principal	[1]						27,000
Carrying amount	[1]						27,000
Fair value	[1]						27,000
The 2019 Senior Credit Facility [Member]
Principal	[1]	92,900
Carrying amount	[1]	92,900
Fair value	[1]	92,900
Convertible Second Lien Notes [Member]
Principal			[2]				53,691	[2]	$ 40,000
Carrying amount			[2]	$ 40,000			49,820	[2]	$ 29,000
Fair value	[2]						60,857
New Convertible Second Lien Notes, New 2L Notes [Member]
Principal		12,969	[3]		$ 12,000			[3]
Carrying amount		11,535	[3]		$ 10,600	$ 12,000		[3]
Fair value	[3]	$ 12,952

[1] The carrying amount for the 2017 Senior Credit Facility and the 2019 Senior Credit Facility represent fair value as they were fully secured.

[2] The debt discount was being amortized using the effective interest rate method based upon a maturity date of August 30, 2019 until the Convertible Second Lien Notes were fully paid off on May 29, 2019.

[3] The debt discount is being amortized using the effective interest rate method based upon a maturity date of May 31, 2021. The principal includes paid-in-kind interest of $1.0 million as of December 31, 2019. The carrying value includes $1.1 million of unamortized debt discount and $0.3 million of unamortized issuance cost at December 31, 2019. The fair value of the New 2L Notes, a Level 2 fair value estimate, was obtained by using the last known sale price for the value on December 31, 2019.