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Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($)
$ in Thousands
Mar. 31, 2025
Jun. 30, 2024
Current assets    
Cash and cash equivalents $ 2,812 $ 10,442
Short-term investments 18,057 21,474
Accounts receivable 516 77
Contract Asset 7 0
Inventory, net:    
Raw materials 2,296 2,038
Work-in-process 146 66
Finished goods 310 370
Prepaid expenses and other current assets 431 261
Total current assets 24,575 34,728
Property, Plant and Equipment, Net 2,486 2,763
Intangible asset, net 50 0
Operating lease assets 35 119
Other assets, net 346 30
Total assets 27,492 37,640
Liabilities, Current [Abstract]    
Accounts payable 616 373
Payroll related accruals 928 1,174
Accrued expenses and other liabilities 882 754
Operating and Finance Leases, Liability, Current 66 227
Total current liabilities 2,492 2,528
Accrued expenses and other liabilities, net of current portion 193 232
Operating and Finance Leases, Liability, Noncurrent 55 73
Total liabilities 2,740 2,833
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 issued and outstanding at March 31, 2025, and June 30, 2024) 0 0
Common stock, $0.001 par value (250,000,000 shares authorized at March 31, 2025, and June 30, 2024, respectively; 1,704,269 and 1,712,045 shares issued at March 31, 2025, and June 30, 2024, respectively; 1,693,953 and 1,701,729 shares outstanding at March 31, 2025, and June 30, 2024, respectively) 190,643 190,643
Treasury shares (10,316 shares at March 31, 2025, and June 30, 2024) (119) (119)
Additional paid-in capital 83,109 82,480
Accumulated deficit (247,940) (237,020)
Accumulated other comprehensive loss (941) (1,177)
Total stockholders’ equity 24,752 34,807
Total liabilities and stockholders’ equity $ 27,492 $ 37,640