Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Revenue	$ 50	$ 35	$ 1,590	$ 336
Cost of revenue	42	24	867	211
Gross profit	8	11	723	125
Operating expenses:
Selling, general and administrative	1,833	1,406	5,501	4,606
Research and development	1,708	1,355	5,158	3,847
Total operating expenses	3,541	2,761	10,659	8,453
Loss from operations	(3,533)	(2,750)	(9,936)	(8,328)
Other income and expense, net	379	375	1,229	1,006
Loss from operations before income taxes	(3,154)	(2,375)	(8,707)	(7,322)
Net loss	$ (3,154)	$ (2,375)	$ (8,707)	$ (7,322)
Weighted average common shares outstanding:
Basic and diluted (in shares)	1,633	1,616	1,632	1,614
Basic and diluted net loss per common share:
Net loss per common share (in dollars per share)	$ (1.93)	$ (1.47)	$ (5.34)	$ (4.54)
Other comprehensive loss, net of tax:
Net loss	$ (3,154)	$ (2,375)	$ (8,707)	$ (7,322)
Available-for-sale securities:
Net unrealized gain/(loss)	13	181	284	(189)
Total comprehensive loss	$ (3,141)	$ (2,194)	$ (8,423)	$ (7,511)