CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash Flows from Operating Activities:
Net (loss)	$ (1,077)	$ (915)
Adjustments to reconcile net loss to net cash (used) by operating activities:
Amortization of right-of-use assets	53	60
Asset valuation allowances	(35)	12
Changes in assets and liabilities:
Accounts receivable	768	(410)
Inventory	(321)	(16)
Prepaid purchases	(140)	(380)
Prepaid expenses and other current assets	122	8
Accounts payable and other current liabilities	89	(41)
Short term lease liabilities	(22)	(39)
Long term lease liabilities	(35)	(26)
Due to affiliate		1
Deferred revenue	(70)	(65)
Net cash (used) by operating activities	(668)	(1,811)
Cash Flows From Investing Activities:
Proceeds from sale of short-term investments		984
Net cash provided by investing activities		984
Cash Flows from Financing Activities:
Net decrease in cash and cash equivalents	(668)	(827)
Cash and cash equivalents at beginning of the year	25,576	5,245
Cash and cash equivalents at end of the year	24,908	4,418
Cash paid for:
Interest	$ 3	$ 1