Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Dec. 31, 2025	Jun. 30, 2025
Current assets
Cash and cash equivalents	$ 3,095	$ 3,100
Short-term investments	7,037	15,108
Accounts receivable	133	485
Inventory, net:
Raw materials	2,865	2,194
Work-in-process	496	425
Finished goods	310	310
Prepaid expenses and other current assets	412	353
Total current assets	14,348	21,975
Property and equipment, net	2,975	2,395
Intangible asset, net	50	48
Operating lease assets	1,977	2,225
Other assets, net	346	346
Total assets	19,696	26,989
Current liabilities
Accounts payable	649	1,066
Payroll related accruals	411	529
Accrued expenses and other liabilities	570	451
Lease liabilities, current	268	405
Total current liabilities	1,898	2,451
Accrued expenses and other liabilities, net of current portion	96	164
Lease liabilities, net of current portion	2,184	2,274
Total liabilities	4,178	4,889
Commitments and contingencies (Note 14)
Stockholders’ equity
Convertible preferred stock, $0.001 par value, 2,500,000 shares authorized; 280,898 shares of Series D Preferred Stock issued and outstanding at December 31, 2025, and June 30, 2025 respectively.	0	0
Common stock, $0.001 par value, 250,000,000 shares authorized at December 31, 2025, and June 30, 2025, respectively; 1,769,269 shares issued at December 31, 2025, and June 30, 2025, respectively; 1,758,953 outstanding at December 31, 2025, and June 30, 2025, respectively	190,643	190,643
Treasury shares, 10,316 at December 31, 2025, and June 30, 2025, respectively	(119)	(119)
Additional paid-in capital	83,804	83,310
Accumulated deficit	(258,262)	(250,870)
Accumulated other comprehensive loss	(548)	(864)
Total stockholders’ equity	15,518	22,100
Total liabilities and stockholders’ equity	$ 19,696	$ 26,989