Note G - Debt Obligations - Convertible Notes Outstanding (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Convertible notes	$ 80,199	$ 83,340
Less: debt issuance costs and discounts	(2,856)	(1,902)
Convertible notes, net	77,343	81,438
Deerfield Convertible Notes [Member]
Convertible notes	6,981	6,667
2021 Notes [Member]
Convertible notes	3,000	76,673
The 2019 Notes [Member]
Convertible notes	$ 70,218

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant