CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Cash Flows from Operating Activities:
Net (loss)	$ (915)	$ (1,125)
Adjustments to reconcile net loss to net cash (used) by operating activities:
Amortization of right-of-use assets	60	56
Depreciation and amortization		1
Asset allowances and reserves	12	(23)
Changes in assets and liabilities:
Accounts receivable	(410)	(1)
Inventory	(16)	(209)
Prepaid purchases	(380)	(90)
Prepaid expenses and other current assets	8	36
Accounts payable and other current liabilities	(41)	184
Short term lease liabilities	(39)	5
Long term lease liabilities	(26)	(64)
Due to affiliate	1
Deferred revenue	(65)	(60)
Net cash (used) by operating activities	(1,811)	(1,290)
Cash Flows From Investing Activities:
Net proceeds (purchases) of short-term investments	984	903
Net cash provided by investing activities	984	903
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	(827)	(183)
Cash and cash equivalents at beginning of the year	5,245	6,276
Cash and cash equivalents at end of the year	4,418	$ 6,093
Cash paid for:
Interest	$ 1