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Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Income Statement [Abstract]
Revenue	$ 7	$ 41	$ 40	$ 41
Cost of revenue	0	24	11	24
Gross profit	7	17	29	17
Operating expenses:
Selling, general and administrative	1,286	1,602	2,430	3,034
Research and development	897	1,582	2,000	3,226
Total operating expenses	2,183	3,184	4,430	6,260
Loss from operations	(2,176)	(3,167)	(4,401)	(6,243)
Interest and other income, net	16	30	3	100
Loss before income taxes	(2,160)	(3,137)	(4,398)	(6,143)
Income tax benefit	0	0	0	0
Net loss	$ (2,160)	$ (3,137)	$ (4,398)	$ (6,143)
Weighted average common shares outstanding:
Basic and diluted	4,678	4,060	4,374	4,059
Basic and diluted net loss per common share:
Net loss	$ (0.46)	$ (0.77)	$ (1.01)	$ (1.51)
Other comprehensive loss, net of tax:
Net loss	$ (2,160)	$ (3,137)	$ (4,398)	$ (6,143)
Available-for-sale securities:
Net unrealized gain		(36)		(35)
Reclassification adjustment for realized loss	0	33	31	34
Total comprehensive loss	$ (2,160)	$ (3,140)	$ (4,367)	$ (6,144)

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