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Consolidated Statements of Operations (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Jan. 31, 2024
Jan. 31, 2023
Jan. 31, 2024
Jan. 31, 2023
Income Statement [Abstract]        
Revenues $ 1,792 $ 734 $ 3,953 $ 1,752
Cost of revenues 979 598 1,989 1,382
Gross margin 813 136 1,964 370
Operating expenses 8,551 6,820 24,648 19,546
(Gain)/loss from change in fair value of consideration (33) 373 (117) 154
Operating loss (7,705) (7,057) (22,567) (19,330)
Interest income, net 151 229 760 604
Other income, proceeds from insurance claim 458 458
Other income, employee retention credit 1,202
Loss on disposition of assets (Note 7) (210) (210)
Foreign exchange gain 1 2 2 2
Loss before income taxes (7,763) (6,368) (22,015) (17,064)
Income tax benefit 1,254 278 1,254 278
Net loss $ (6,509) $ (6,090) $ (20,761) $ (16,786)
Basic net loss per share $ (0.11) $ (0.11) $ (0.35) $ (0.30)
Diluted net loss per share $ (0.11) $ (0.11) $ (0.35) $ (0.30)
Weighted average shares used to compute basic net loss per common share 58,865,898 55,966,672 58,790,160 55,918,284
Weighted average shares used to compute diluted net loss per common share 58,865,898 55,966,672 58,790,160 55,918,284