CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash Flows from Operating Activities:
Net (loss)	$ (1,547)	$ (2,081)
Adjustments to reconcile net loss to net cash (used) by operating activities:
Loan forgiveness from Paycheck Protection Program	(207)
Amortization of right-of-use assets	113	113
Depreciation and amortization		1
Asset allowances and reserves	71	10
Changes in assets and liabilities:
Accounts receivable	(865)	(385)
Inventory	(938)	(159)
Prepaid purchases	(92)	(251)
Prepaid expenses and other current assets	(277)	(195)
Accounts payable and other current liabilities	(54)	313
Right of use assets-operating	(403)
Short term lease liabilities	68	(13)
Long term lease liabilities	219	(106)
Income taxes payable	(223)	(197)
Deferred revenue	(130)	(120)
Net cash (used) by operating activities	(4,265)	(3,070)
Cash Flows From Investing Activities:
Net proceeds (purchases) of short-term investments	25,045	3,101
Net cash provided by investing activities	25,045	3,101
Cash Flows from Financing Activities:
Proceeds from Paycheck Protection Program loan		204
Net cash provided by financing activities		204
Net increase in cash and cash equivalents	20,780	235
Cash and cash equivalents at beginning of the year	5,245	6,276
Cash and cash equivalents at end of the year	26,025	6,511
Cash paid for:
Interest	4	1
Income taxes	$ 222	$ 197