Balance Sheets (Current Period Unaudited) - USD ($)	Sep. 30, 2022	Mar. 31, 2022
Current assets
Cash and cash equivalents	$ 3,583,539	$ 10,449,510	[1]
Marketable securities, short-term	10,326,647	20,839,683	[1]
Accounts receivable, net of allowance for uncollectible accounts of $15,000	5,860,414	4,704,829	[1]
Inventories	5,794,849	5,088,635	[1]
Prepaid expenses and other assets	600,913	420,520	[1]
Total current assets	26,166,362	41,503,177	[1]
Fixed assets
Machinery and equipment	9,603,049	9,739,244	[1]
Leasehold improvements	1,826,334	1,810,872	[1]
Property, Plant and Equipment, Gross, Ending Balance	11,429,383	11,550,116	[1]
Less accumulated depreciation and amortization	10,990,224	10,943,731	[1]
Net fixed assets	439,159	606,385	[1]
Deferred tax assets	894,045	483,469	[1]
Marketable securities, long-term	39,514,685	24,314,211	[1]
Right-of-use asset – operating lease	494,070	560,250	[1]
Total assets	67,508,321	67,467,492	[1]
Current liabilities
Accounts payable	399,263	943,535	[1]
Accrued payroll and other	2,861,151	1,356,689	[1]
Operating lease	157,830	156,121	[1]
Total current liabilities	3,418,244	2,456,345	[1]
Operating lease	374,941	446,018	[1]
Total liabilities	3,793,185	2,902,363	[1]
Shareholders’ equity
Common stock, $0.01 par value, 6,000,000 shares authorized; 4,830,826 issued and outstanding as of September 30 and March 31, 2022	48,308	48,308	[1]
Additional paid-in capital	19,303,570	19,256,485	[1]
Accumulated other comprehensive (loss)	(1,784,035)	(318,120)
Retained earnings	46,147,293	45,578,456	[1]
Total shareholders’ equity	63,715,136	64,565,129	[1]
Total liabilities and shareholders’ equity	$ 67,508,321	$ 67,467,492	[1]

[1] The March 31, 2021 Balance Sheet is derived from the audited financial statements contained in our Annual Report on Form 10-K for the fiscal year ended March 31, 2021.