CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash Flows from Operating Activities:
Net (loss)	$ (2,081)	$ (1,863)
Adjustments to reconcile net loss to net cash (used) by operating activities:
Amortization of right-of-use assets	113	40
Depreciation and amortization	1	1
Deferred tax assets		6
Asset allowances and reserves	10	(37)
Changes in assets and liabilities:
Accounts receivable	(385)	(32)
Inventory	(159)	899
Prepaid purchases	(251)	2
Prepaid expenses and other current assets	(195)	(165)
Other assets		19
Accounts payable and other current liabilities	313	46
Short term lease liabilities	(13)
Long term lease liabilities	(106)
Income taxes payable	(197)	(196)
Deferred revenue	(120)	(110)
Net cash (used) by operating activities	(3,070)	(1,390)
Cash Flows From Investing Activities:
Proceeds from sale of short-term investments	3,101
Purchases of short-term investments		(1,443)
Net cash provided (used) by investing activities	3,101	(1,443)
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	235	(2,833)
Cash and cash equivalents at beginning of the year	6,276	7,917
Cash and cash equivalents at end of the year	6,511	5,084
Cash paid for:
Interest	1
Income taxes	$ 197	$ 199