Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	May 31, 2020	May 31, 2019
Statement of Cash Flows [Abstract]
Net income (loss)	$ 369	$ (249)
Adjustments to reconcile net income (loss) to net cash provided in operating activities:
Depreciation and amortization	59	54
Operating lease expense	93	92
Net realized and unrealized losses (gains) on investments	7	(3)
Changes in operating assets and liabilties:
Accounts receivable	79	357
Inventories	(420)	547
Prepaid expenses and other current assets	(61)	(53)
Payments on operating lease liabilities	(101)	(92)
Accounts payable	45	(123)
Customer deposit	(29)	0
Accrued expenses and other current liabilities	252	8
Net cash provided by operating activities	293	538
Investing Activities:
Proceeds from sale of securities	169	35
Purchases of securities	(222)	(19)
Purchases of property and equipment	(23)	(3)
Net cash (used in) provided by investing activities	(76)	13
Net cash provided by financing activities	0	0
Net increase in cash and cash equivalents	217	551
Cash and cash equivalents - beginning of the year	1,332	394
Cash and cash equivalents - end of period	1,549	945
Non-cash Transactions:
Capitalization of ROU asset and liability	0	1,081
Adjustment for Adoption of ASC 842	$ 0	$ (91)