Note 4 - Balance Sheet Components (Tables)

9 Months Ended

Sep. 30, 2020

Notes Tables

Schedule of Cash and Cash Equivalents [Table Text Block]

	September 30, 2020		December 31, 2019
	(in thousands)
Cash at banks	$	33,436	$	13,511
Money market funds		100,002		15
Total cash and cash equivalents	$	133,438	$	13,526

Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]

	September 30, 2020		December 31, 2019
	(in thousands)
Royalties receivable	$	250	$	3,438
Customer service contracts - billed		—		181
Accounts receivable	$	250	$	3,619

Property, Plant and Equipment [Table Text Block]

	September 30, 2020			December 31, 2019
	(in thousands)
Laboratory equipment	$	1,036		$	537
Office and computer equipment		163			132
Total property and equipment		1,199			669
Less: accumulated depreciation		(537	)		(459	)
Property and equipment, net	$	662		$	210

Lessee, Operating Lease, Right-of-Use Assets [Table Text Block]

	September 30, 2020		December 31, 2019
	(in thousands)
Facilities	$	2,588	$	1,985
Office equipment		3		5
Right-of-use assets, net	$	2,591	$	1,990

Schedule of Finite-Lived Intangible Assets [Table Text Block]

	September 30, 2020			December 31, 2019
	(in thousands)
Purchased technology	$	22,100		$	22,100
Intellectual property		80			80
Total cost		22,180			22,180
Less: accumulated amortization		(6,386	)		(5,087	)
Intangible assets, net	$	15,794		$	17,093

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

Year Ending December 31,	Amount
2020 (three months remaining)	$	433
2021		1,732
2022		1,731
2023		1,732
2024		1,732
Thereafter		8,434
Total	$	15,794

Schedule of Accrued Liabilities [Table Text Block]

	September 30, 2020		December 31, 2019
	(in thousands)
Accrued compensation	$	1,132	$	903
Accrued clinical and manufacturing expenses		1,386		3,228
Accrued professional and consulting services		677		2
Reserve for return of royalties		—		178
Other liabilities, current portion		529		254
Total	$	3,724	$	4,565