Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Feb. 28, 2021	Feb. 29, 2020
Statement of Cash Flows [Abstract]
Net income (loss)	$ 1,381	$ (606)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	225	220
Operating lease expense	383	358
Net realized and unrealized (gains) on investments	(134)	(13)
Stock based compensation	75	282
Changes in operating assets and liabilties:
Accounts receivable	73	450
Inventories	149	1,088
Prepaid expenses and other current assets	(254)	38
Other assets	5	2
Payments on operating lease liabilities	(417)	(379)
Accounts payable	(104)	(364)
Customer deposit	(4)	48
Accrued expenses and other liabilities	296	(6)
NET CASH PROVIDED BY OPERATING ACTIVITIES	1,674	1,118
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from sale of marketable securities	530	73
Purchase of marketable securities	(477)	(145)
Purchase of property and equipment	(75)	(108)
NET CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES	(22)	(180)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from SBA Paycheck Protection Program loan	807	0
Purchase of treasury stock	(6)	0
NET CASH (USED IN) FINANCING ACTIVITIES	801	0
Net increase (decrease) in cash and cash equivalents	2,453	938
Cash and cash equivalents - beginning of the year	1,332	394
Cash and cash equivalents - end of the year	3,785	1,332
Supplemental disclosure of cash flow information:
Non cash increase in plant, property and equipment	26	0
Adjustment for adoption of ASC 842	0	(91)
Capitalization of ROU asset and liability	$ 0	$ 1,081