Consolidated Statements of Operations and Comprehensive Loss - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Income Statement [Abstract]
Revenue	$ 334	$ 488
Cost of revenue	298	449
Gross profit	36	39
Operating expenses:
Selling, general and administrative	4,741	4,716
Research and development	2,692	3,437
Disposal of corporate lease	513
Total operating expenses	7,946	8,153
Loss from operations	(7,910)	(8,114)
Interest and other (expense), net	(235)	(197)
Gain on extinguishment of debt - PPP loan	542	0
Loss from operations before income taxes	(7,603)	(8,311)
Income tax benefit	0	0
Net loss	$ (7,603)	$ (8,311)
Weighted average common shares outstanding:
Basic and diluted	21,984	6,346
Basic and diluted net loss per common share:	$ (0.35)	$ (1.31)
Other comprehensive loss, net of tax:
Net loss	$ (7,603)	$ (8,311)
Available-for-sale securities
Net unrealized losses, net of zero tax expense	(23)
Total comprehensive loss	$ (7,626)	$ (8,311)