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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended
Jul. 31, 2020
Jul. 31, 2019
Cash flows from operating activities:    
Net loss $ (3,385) $ (3,025)
Adjustments to reconcile net loss to net cash used in operating activities:    
Foreign exchange (gain)/loss (8) 13
Depreciation of fixed assets 37 85
Amortization of right of use asset 52
Compensation expense related to stock option grants and restricted stock 116 92
Gain due to the change in fair value of warrant liabilities (6)
Changes in operating assets and liabilities:    
Accounts receivable 84 (9)
Contract assets (115) (121)
Other assets 181 (30)
Accounts payable 8 (215)
Accrued expenses 381 (332)
Change in lease liability (54) (47)
Contract liabilities (34) (10)
Net cash used in operating activities (2,737) (3,605)
Cash flows from investing activities:    
Purchase of computers, equipment and furniture (28)
Net cash used in investing activities (28)
Cash flows from financing activities:    
Proceeds from Paycheck Protection Program Loan 890
Proceeds from issuance of common stock- Aspire financing net of issuance costs 2,635
Proceeds from issuance of common stock- AGP At The Market offering, net of issuance costs 243
Proceeds (costs) associated with exercise of pre-funded warrants (18)
Acquisition of treasury stock (1)
Net cash provided/ (used) by financing activities 3,768 (19)
Effect of exchange rate changes on cash, cash equivalents and restricted cash 32 (20)
Net increase/(decrease) in cash, cash equivalents and restricted cash 1,063 (3,672)
Cash, cash equivalents and restricted cash, beginning of period 10,930 17,159
Cash, cash equivalents and restricted cash, end of period 11,993 13,487
Prepaid financing costs reported in accrued expenses 40
Supplemental disclosure of noncash investing activities:    
Acquisition of computers, equipment and furniture through accounts payable $ 1