Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Revenue	$ 38	$ 187
Cost of revenue	32	175
Gross profit	6	12
Operating expenses:
Selling, general and administrative	1,642	1,426
Research and development	1,129	639
Total operating expenses	2,771	2,065
Loss from operations	(2,765)	(2,053)
Other income and (expense), net	(235)	(24)
Loss from operations before income taxes	(2,530)	(2,029)
Income tax benefit	0	0
Net loss	$ (2,530)	$ (2,029)
Weighted average common shares outstanding:
Basic and diluted (in shares)	48,355	47,428
Basic and diluted net loss per common share:
Net loss (in dollars per share)	$ (0.05)	$ (0.04)
Other comprehensive loss, net of tax:
Net loss	$ (2,530)	$ (2,029)
Available-for-sale securities:
Net unrealized losses, net of zero tax expense	(368)	(48)
Total comprehensive loss	$ (2,898)	$ (2,077)