Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Revenue	$ 97	$ 54	$ 845	$ 324
Cost of revenue	46	46	662	287
Gross profit	51	8	183	37
Operating expenses:
Selling, general and administrative	1,476	1,679	4,630	3,408
Research and development	722	669	2,013	2,036
Disposal of corporate lease	0	0	0	544
Total operating expenses	2,198	2,348	6,643	5,988
Loss from operations	(2,147)	(2,340)	(6,460)	(5,951)
Other income and (expense), net	47	(63)	151	(185)
Loss from operations before income taxes	(2,100)	(2,403)	(6,309)	(6,136)
Income tax benefit	0	0	0	0
Net loss	$ (2,100)	$ (2,403)	$ (6,309)	$ (6,136)
Weighted average common shares outstanding:
Basic and diluted (in shares)	47,611	18,171	47,506	14,649
Basic and diluted net loss per common share:
Net loss (in dollars per share)	$ (0.04)	$ (0.13)	$ (0.13)	$ (0.42)
Other comprehensive loss, net of tax:
Net loss	$ (2,100)	$ (2,403)	$ (6,309)	$ (6,136)
Available-for-sale securities:
Net unrealized loss	(524)	0	(769)	0
Total comprehensive loss	$ (2,624)	$ (2,403)	$ (7,078)	$ (6,136)