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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 3 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Statement of Cash Flows [Abstract]    
Net loss $ (1,788) $ (1,882)
Adjustment to reconcile net loss to net cash:    
Depreciation and amortization 157 77
Impairment of investment 37 0
Common stock-based compensation and expenses, net 125 166
Forgiveness of PPP Loan (430) 0
Changes in:    
Accounts receivables 13 (157)
Inventory 2 (2,277)
Deposits and advances 4 (479)
Claims and advances 7 24
Accounts payable 90 377
Accrued and other liabilities (46) 163
Operating lease asset (50) 0
Operating lease liability 28 0
Net cash used in operating activities (1,851) (3,988)
Investing activities:    
Purchase of property, plant, and equipment (93) (944)
Investment in marketable securities 0 (17)
Investment in non-marketable securities 0 (149)
Acquisition and filing cost of patents and rights (2) (26)
Net cash used in investing activities (95) (1,136)
Financing activities:    
Issuance of equity stock through offering (net of expenses) 726 0
Proceeds from long- term loan 0 580
Net cash provided by financing activities 726 580
Effects of exchange rate changes on cash and cash equivalents (9) (11)
Net decrease in cash and cash equivalents (1,229) (4,555)
Cash and cash equivalents at the beginning of the period 14,548 7,258
Cash and cash equivalents at the end of the period 13,319 2,703
Non-cash items:    
Common stock issued/granted including ESOP, consultancy, and patent acquisition 125 166
Amortization of operating lease 27 21
Forgiveness of PPP Loan $ (430) $ 0