CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash Flows from Operating Activities:
Net (loss)	$ (1,125)	$ (987)
Adjustments to reconcile net loss to net cash (used) by operating activities:
Amortization of right-of-use assets	56	51
Depreciation and amortization	1
Asset allowances and reserves	(23)	(51)
Changes in assets and liabilities:
Accounts receivable	(1)	(212)
Inventory	(209)	165
Prepaid purchases	(90)	402
Prepaid expenses and other current assets	36	68
Accounts payable and other current liabilities	184	175
Short term lease liabilities	5
Long term lease liabilities	(64)
Due to affiliate		1
Income taxes payable		(1)
Deferred revenue	(60)	(55)
Net cash (used) by operating activities	(1,290)	(444)
Cash Flows From Investing Activities:
Proceeds from sale of short-term investments	903
Purchases of short-term investments		(213)
Net cash provided (used) by investing activities	903	(213)
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	(183)	(657)
Cash and cash equivalents at beginning of the year	6,276	7,917
Cash and cash equivalents at end of the year	$ 6,093	$ 7,260