Consolidated Statements of Operations and Comprehensive Loss - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Income Statement [Abstract]
Revenue	$ 488	$ 127
Cost of revenue	449	90
Gross profit	39	37
Operating expenses:
Selling, general and administrative	4,716	4,876
Research and development	3,437	3,578
Total operating expenses	8,153	8,454
Loss from operations	(8,114)	(8,417)
Interest and other (expense) income, net	(197)	25
Loss from operations before income taxes	(8,311)	(8,392)
Income tax benefit	0	858
Net loss	$ (8,311)	$ (7,534)
Weighted average common shares outstanding:
Basic and diluted	6,346	4,940
Basic and diluted net loss per common share:	$ (1.31)	$ (1.53)
Other comprehensive loss, net of tax:
Net loss	$ (8,311)	$ (7,534)
Available-for-sale securities
Reclassification adjustment for realized losses included in net loss, net of zero tax expense	0	31
Total comprehensive loss	$ (8,311)	$ (7,503)