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Consolidated Statements of Comprehensive Loss - USD ($) shares in Thousands, $ in Thousands	6 Months Ended	12 Months Ended
	Dec. 31, 2018	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Revenues:
Total revenues	$ 2,928	$ 2,961	$ 7,539	$ 1,620
Operating expenses:
Research and development	10,412	16,178	14,880	14,381
Sales and marketing	8,174	1,512	0	0
General and administrative	8,901	11,545	11,235	9,013
Total operating expenses	27,487	29,235	26,115	23,394
Operating loss	(24,559)	(26,274)	(18,576)	(21,774)
Interest and other income, net	367	101	91	72
Interest expense	(1,642)	(720)	0	0
Change in fair value of derivative liability	(18,886)	(26,278)	0	0
Loss before income taxes	(44,720)	(53,171)	(18,485)	(21,702)
Income tax benefit	0	0	0	155
Net loss	$ (44,720)	$ (53,171)	$ (18,485)	$ (21,547)
Net loss per share:
Basic and diluted	$ (0.53)	$ (1.15)	$ (0.52)	$ (0.68)
Weighted average common shares outstanding:
Basic and diluted	85,057	46,226	35,344	31,623
Net loss	$ (44,720)	$ (53,171)	$ (18,485)	$ (21,547)
Other comprehensive income (loss):
Foreign currency translation adjustments	1	5	(21)	(96)
Net unrealized gain on marketable securities	0	0	2	3
Other comprehensive income (loss)	1	5	(19)	(93)
Comprehensive loss	(44,719)	(53,166)	(18,504)	(21,640)
Collaborative Research and Development [Member]
Revenues:
Total revenues	1,883	1,343	6,569	398
Royalty Income [Member]
Revenues:
Total revenues	$ 1,045	$ 1,618	$ 970	$ 1,222

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