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Consolidated Balance Sheets - USD ($)
$ in Thousands
Jul. 31, 2022
Apr. 30, 2022
Current assets:    
Cash and cash equivalents $ 9,176 $ 7,885
Marketable securities 42,724 49,384
Restricted cash, short-term 258 258
Accounts receivable 119 482
Contract assets 666 386
Inventory 588 442
Other current assets 480 467
Total current assets 54,011 59,304
Property and equipment, net 458 445
Intangibles, net 4,096 4,136
Right-of-use asset, net 677 752
Restricted cash, long-term 219 219
Goodwill 8,537 8,537
Total assets 67,998 73,393
Current liabilities:    
Accounts payable 1,058 905
Accrued expenses 1,090 877
Contract liabilities 101 129
Right-of-use liability, current portion 328 319
Contingent liabilities, current portion 640 748
Total current liabilities 3,217 2,978
Deferred tax liability 203 203
Contingent liabilities, less current portion 820 843
Right-of-use liability, less current portion 446 538
Total liabilities 4,686 4,562
Commitments and contingencies (Note 13)  
Shareholders’ Equity:    
Preferred stock, $0.001 par value; authorized 5,000,000 shares, none issued or outstanding
Common stock, $0.001 par value; authorized 100,000,000 shares, issued 55,921,880 shares and 55,905,213 shares, respectively; outstanding 55,898,528 shares and 55,881,861 shares, respectively 56 56
Treasury stock, at cost; 23,352 shares (341) (341)
Additional paid-in capital 323,265 322,932
Accumulated deficit (259,622) (253,770)
Accumulated other comprehensive loss (46) (46)
Total shareholders’ equity 63,312 68,831
Total liabilities and shareholders’ equity $ 67,998 $ 73,393