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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 9 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Cash flows from operating activities:    
Net loss $ (7,476) $ (8,513)
Adjustment to reconcile net loss to net cash:    
Depreciation and amortization 504 486
Provision for bad debt 0 1,718
Impairment of non-marketable securities 0 37
Common stock-based compensation and expenses, net 2,260 1,072
Net loss on sale of property, plant, and equipment 39 0
Forgiveness of PPP Loan 0 (430)
Changes in operating assets and liabilities:    
Accounts receivables, net (127) 11
Inventory (200) 51
Deposits and advances 656 (186)
Claims and advances (91) (10)
Accounts payable (516) (117)
Accrued and other liabilities (572) (669)
Operating lease asset 93 6
Operating lease liability (100) (31)
Net cash used in operating activities (5,530) (6,575)
Cash flow from investing activities:    
Net sale/(purchase) of property, plant, and equipment 239 (152)
Investment in short term investments (88) 0
Acquisition and filing cost of patents and rights (144) (37)
Net cash provided by/(used in) investing activities 7 (189)
Cash flows from financing activities:    
Issuance of equity stock through offering (net of expenses) 103 4,145
Repayment of long-term loan (2) (2)
Net cash provided by financing activities 101 4,143
Effects of exchange rate changes on cash and cash equivalents (93) 14
Net decrease in cash and cash equivalents (5,515) (2,607)
Cash and cash equivalents at the beginning of the period 10,460 14,548
Cash and cash equivalents at the end of the period 4,945 11,941
Non-cash items:    
Common stock issued/granted for stock-based compensation, including patent acquisition 2,260 1,072
Forgiveness of PPP Loan $ 0 $ (430)