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Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2025
Mar. 31, 2024
Revenue $ 534 $ 50 $ 829 $ 1,590
Cost of revenue 297 42 428 867
Gross profit 237 8 401 723
Operating expenses:        
Selling, general and administrative 2,115 1,833 5,842 5,501
Research and development 1,989 1,708 6,375 5,158
Total operating expenses 4,104 3,541 12,217 10,659
Loss from operations (3,867) (3,533) (11,816) (9,936)
Other income and expense, net 234 379 896 1,229
Net loss $ (3,633) $ (3,154) $ (10,920) $ (8,707)
Weighted average common shares outstanding:        
Basic and diluted (in shares) 1,665 1,633 1,663 1,632
Basic and diluted net loss per common share:        
Net loss per common share (in dollars per share) $ (2.18) $ (1.93) $ (6.57) $ (5.34)
Other comprehensive loss, net of tax:        
Net loss $ (3,633) $ (3,154) $ (10,920) $ (8,707)
Available-for-sale securities:        
Net unrealized gain 139 13 236 284
Total comprehensive loss $ (3,494) $ (3,141) $ (10,684) $ (8,423)