CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash Flows from Operating Activities:
Net (loss)	$ (3,976)	$ (4,307)
Adjustments to reconcile net loss to net cash (used) by operating activities:
Amortization of right-of-use assets	231	33
Depreciation and amortization	2	2
Deferred tax assets		448
Asset allowances and reserves	(22)	3
Changes in assets and liabilities:
Accounts receivable	(185)	117
Inventory	(43)	1,602
Prepaid purchases	(111)	167
Prepaid expenses and other current assets	38	97
Other assets		60
Accounts payable and other current liabilities	196	47
Short term lease liabilities	(89)
Long term lease liabilities	(153)
Due to affiliate	1
Income taxes payable	(197)	(195)
Deferred revenue	15	15
Net cash (used) by operating activities	(4,293)	(1,911)
Cash Flows From Investing Activities:
Proceeds from sale of short-term investments	28,101	1,850
Purchases of short-term investments	(25,045)	(1,580)
Disposals of property and equipment	2
Net cash provided by investing activities	3,058	270
Cash Flows from Financing Activities:
Proceeds from Paycheck Protection Program loan	204
Net cash provided by financing activities	204
Net (decrease) in cash and cash equivalents	(1,031)	(1,641)
Cash and cash equivalents at beginning of the year	6,276	7,917
Cash and cash equivalents at end of the year	5,245	6,276
Cash paid for:
Interest	7
Income taxes	$ 197	$ 199