Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Cash flows from operating activities:
Net loss	$ (5,553)	$ (4,947)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation	837	791
Depreciation	301	149
Amortization of operating lease right of use assets	72	50
Interest on financing leases	8	7
Changes in assets and liabilities:
Accounts receivable	(69)	(56)
Contract asset	0	(2)
Inventory, net	(69)	21
Accounts payable	20	132
Income tax payable	1	(1)
Other assets and liabilities	(324)	(349)
Operating lease liabilities	(74)	(50)
Net cash used in operating activities	(4,850)	(4,255)
Cash flows from investing activities:
Purchases of property and equipment	(177)	(632)
Net cash provided by (used in) investing activities	1,828	(5,732)
Cash flows from financing activities:
Repayment of related-party debt	0	(500)
Repayments on finance lease liabilities	(90)	(77)
Net cash used in financing activities	(90)	(577)
Net change in cash and cash equivalents	(3,112)	(10,564)
Cash and cash equivalents at beginning of period	14,208	26,453
Cash and cash equivalents at end of period	11,096	15,889
Supplemental disclosures of cash flow information:
Cash paid for interest	8	63
Operating right of use assets and associated liabilities	0	223
Income taxes paid	1	1
Interest-bearing Time Deposits [Member]
Cash flows from investing activities:
Purchases of short-term investments	0	0
Proceeds (or purchases) from short-term investments	$ 2,005	$ (5,100)