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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 6 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Statement of Cash Flows [Abstract]    
Net loss $ (6,132) $ (3,539)
Adjustment to reconcile net loss to net cash:    
Depreciation and amortization 320 185
Provision for bad debt 1,718 0
Impairment of non-marketable securities 37 0
Common stock-based compensation and expenses 549 365
Forgiveness of PPP Loan (430) 0
Changes in:    
Accounts receivables 36 (134)
Inventory (20) (2,439)
Deposits and advances (150) (871)
Claims and advances (8) 35
Accounts payable (56) 239
Accrued and other liabilities 6 (291)
Operating lease asset (22) 0
Operating lease liability (1) 0
Net cash used in operating activities (4,153) (6,450)
Investing activities:    
Purchase of property, plant, and equipment (125) (1,229)
Investment in/Proceed from marketable securities 0 1,231
Investment in non-marketable securities 0 (149)
Acquisition and filing cost of patents and rights (15) (48)
Net cash used in investing activities (140) (195)
Financing activities:    
Issuance of equity stock through offering (net of expenses) 4,145 0
Proceeds from/Repayment of long- term loan (1) 530
Net cash provided by financing activities 4,144 530
Effects of exchange rate changes on cash and cash equivalents 0 8
Net decrease in cash and cash equivalents (149) (6,107)
Cash and cash equivalents at the beginning of the period 14,548 7,258
Cash and cash equivalents at the end of the period 14,399 1,151
Non-cash items:    
Common stock issued/granted for stock-based compensation, including patent acquisition 549 416
Amortization of operating lease 53 19
Forgiveness of PPP Loan $ (430) $ 0