Note 15 - Unaudited Quarterly Results (Unaudited)

12 Months Ended

Dec. 31, 2019

Notes to Financial Statements

Quarterly Financial Information [Text Block]

1

5

. Unaudited Quarterly Results

(unaudited)

Summarized quarterly financial data during

2019

and

2018

are as follows:

	2019 Quarter Ended
	March 31			June 30			September 30			December 31
Revenues	$	4,281		$	9,966		$	5,613		$	15,126
Operating expenses	$	22,516		$	29,059		$	23,729		$	25,841
Operating loss	$	(18,235	)	$	(19,093	)	$	(18,116	)	$	(10,715	)
Net loss	$	(18,735	)	$	(19,700	)	$	(18,842	)	$	(11,275	)
Net loss per share - basic and diluted	$	(0.22	)	$	(0.23	)	$	(0.22	)	$	(0.13	)
	2018 Quarter Ended
	March 31			June 30			September 30			December 31
Revenues	$	3,189		$	3,878		$	5,317		$	3,238
Operating expenses	$	15,607		$	18,216		$	30,365		$	17,790
Operating loss	$	(12,418	)	$	(14,338	)	$	(25,048	)	$	(14,552	)
Net loss	$	(13,424	)	$	(15,172	)	$	(24,357	)	$	(14,704	)
Net loss per share - basic and diluted	$	(0.19	)	$	(0.20	)	$	(0.30	)	$	(0.17	)