Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash flows from operating activities:
Net loss	$ (2,912)	$ (2,530)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation	364	387
Depreciation	149	67
Amortization of operating lease right of use assets	36	22
Interest on financing leases	4	4
Changes in assets and liabilities:
Accounts receivable	(166)	18
Contract asset	0	2
Inventory, net	(195)	52
Income tax receivable	1	0
Accounts payable	100	118
Income tax payable	0	(1)
Other assets and liabilities	(394)	(558)
Operating lease liabilities	(37)	(22)
Net cash used in operating activities	(3,050)	(2,441)
Cash flows from investing activities:
Purchases of property and equipment	(24)	(346)
Net cash provided by (used in) investing activities	1,977	(5,201)
Cash flows from financing activities:
Repayment of related-party debt	0	(500)
Repayments on finance lease liabilities	(45)	(38)
Net cash used in financing activities	(45)	(538)
Net change in cash and cash equivalents	(1,118)	(8,180)
Cash and cash equivalents at beginning of period	14,208	26,453
Cash and cash equivalents at end of period	13,090	18,273
Supplemental disclosures of cash flow information:
Cash paid for interest	4	59
Income taxes paid	2	1
Interest-bearing Time Deposits [Member]
Cash flows from investing activities:
Purchases of short-term investments	0	(4,855)
Proceeds from short-term investments	$ 2,001	$ 0