Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Cash Flows from Operating Activities:
Net (loss)	$ (1,471)	$ (2,711)
Adjustments to reconcile net loss to net cash (used) by operating activities:
Loan forgiveness from Paycheck Protection Program	0	(207)
Amortization of right-of-use assets	159	164
Asset valuation allowances	39	149
Changes in assets and liabilities:
Accounts receivable	328	(2,077)
Inventory	(233)	(613)
Prepaid purchases	(503)	74
Prepaid expenses and other current assets	136	(94)
Other assets	0	4
Accounts payable and other current liabilities	(244)	354
Right of use assets-operating	0	(403)
Short term lease liabilities	(66)	73
Long term lease liabilities	(104)	161
Due to affiliate	1	0
Income taxes payable	(205)	(223)
Advanced deposits	4,100	0
Deferred revenue	(28)	(195)
Net cash provided (used) by operating activities	1,718	(5,544)
Cash Flows From Investing Activities:
Proceeds from sale of short-term investments	0	25,045
Additions to property and equipment	0	(2)
Purchases of short-term investments	0	0
Net cash provided by investing activities	0	25,043
Cash Flows from Financing Activities:
Net cash provided by financing activities	0	0
Net increase in cash and cash equivalents	1,718	19,499
Cash and cash equivalents at beginning of the year	25,576	5,245
Cash and cash equivalents at end of the year	27,294	24,744
Cash paid for:
Interest	8	8
Income taxes	205	222
License [Member]
Changes in assets and liabilities:
Licensing receivable	$ (191)	$ 0