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Consolidated Balance Sheets - USD ($)
$ in Thousands
Apr. 30, 2020
Apr. 30, 2019
Current assets:    
Cash and cash equivalents $ 10,002 $ 16,660
Restricted cash- short-term 707 344
Accounts receivable 105 63
Contract assets 251 15
Other current assets 588 537
Total current assets 11,653 17,619
Property and equipment, net 499 592
Right-of-use asset, net 1,165
Restricted cash- long-term 221 155
Total assets 13,538 18,366
Current liabilities:    
Accounts payable 220 312
Accrued expenses 1,353 1,938
Current portion of contract liabilities 100 188
Warrant liabilities 6
Right-of-use liability- current 229
Total current liabilities 1,902 2,444
Right-of-use liability 1,078
Long term portion of contract liabilities 65
Deferred rent 147
Total liabilities 3,045 2,591
Commitments and contingencies (Note 15)
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 12,939,420 and 5,425,517 shares, respectively 13 5
Treasury stock, at cost; 4,251 and 3,770 shares, respectively (302) (301)
Additional paid-in capital 231,101 226,026
Accumulated deficit (220,136) (209,784)
Accumulated other comprehensive loss (183) (171)
Total stockholders' equity 10,493 15,775
Total liabilities and stockholders' equity $ 13,538 $ 18,366