Note 3 - Business Combination (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

Schedule of Business Acquisitions, by Acquisition [Table Text Block]

(in thousands)
Cash and cash equivalents	$	193
Restricted cash		31
Prepaid expenses and other current assets		387
Property and equipment, net		76
Intangible assets		77,090
Total identifiable assets acquired	$	77,777
Current liabilities	$	(2,590	)
Loans payable, current		(7,944	)
Deferred tax liabilities, noncurrent		(15,418	)
Other liabilities, noncurrent		(7	)
Net identifiable assets acquired		51,818
Goodwill		15,682
Net assets acquired	$	67,500

Business Acquisition, Pro Forma Information [Table Text Block]

	Year Ended December 31,
(in thousands, except per share data)	2018
Pro forma net loss attributable to common shareholders	$	(38,082	)
Pro forma EPS - basic and diluted	$	(3.60	)

Warrants Issued for CVie Acquisition [Member]

Notes Tables

Schedule of Assumptions Used for Warrant Valution [Table Text Block]

Significant Input Assumptions of Warrant Valuation
Historical volatility	116	%
Expected term (in years)	2.5
Risk-free interest rate	2.62	%