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Consolidated Balance Sheets - USD ($)
$ in Thousands
Jan. 31, 2021
Apr. 30, 2020
Current assets:    
Cash and cash equivalents $ 79,801 $ 10,002
Restricted cash, short-term 384 707
Accounts receivable 105
Contract assets 63 251
Other current assets 1,001 588
Total current assets 81,249 11,653
Property and equipment, net 417 499
Right-of-use asset, net 1,005 1,165
Restricted cash, long-term 222 221
Total assets 82,893 13,538
Current liabilities:    
Loan payable 175
Accounts payable 74 220
Accrued expenses 2,340 1,353
Contract liabilities, current portion 75 100
Right-of-use liability, current portion 252 229
Warrant liabilities
Paycheck protection program loan- current 396
Total current liabilities 3,312 1,902
Paycheck protection program loan, less current portion 495
Right-of-use liability, less current portion 887 1,078
Contract liabilities, less current portion 65
Total liabilities 4,694 3,045
Commitments and contingencies (Note 16)
Stockholders' 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 50,589,809 and 12,939,420 shares, respectively 51 13
Treasury stock, at cost; 21,040 and 4,251 shares, respectively (338) (302)
Additional paid-in capital 310,342 231,101
Stock subscription receivable (1,983)
Accumulated deficit (229,696) (220,136)
Accumulated other comprehensive loss (177) (183)
Total stockholders' equity 78,199 10,493
Total liabilities and stockholders' equity $ 82,893 $ 13,538