Balance Sheets (Current Period Unaudited) - USD ($)	Jun. 30, 2022	Mar. 31, 2022	[1]
Current assets
Cash and cash equivalents	$ 13,299,264	$ 10,449,510
Marketable securities, short-term	14,888,372	20,839,683
Accounts receivable, net of allowance for uncollectible accounts of $15,000	3,513,216	4,704,829
Inventories	5,544,037	5,088,635
Prepaid expenses and other assets	721,989	420,520
Total current assets	37,966,878	41,503,177
Fixed assets
Machinery and equipment	9,603,049	9,739,244
Leasehold improvements	1,826,334	1,810,872
Property, Plant and Equipment, Gross, Ending Balance	11,429,383	11,550,116
Less accumulated depreciation and amortization	10,945,847	10,943,731
Net fixed assets	483,536	606,385
Deferred tax assets	578,291	483,469
Marketable securities, long-term	25,517,937	24,314,211
Right-of-use asset – operating lease	527,553	560,250
Total assets	65,074,195	67,467,492
Current liabilities
Accounts payable	295,443	943,535
Accrued payroll and other	667,372	1,356,689
Operating lease	156,975	156,121
Total current liabilities	1,119,790	2,456,345
Operating lease	411,405	446,018
Total liabilities	1,531,195	2,902,363
Shareholders’ equity
Common stock, $0.01 par value, 6,000,000 shares authorized; 4,830,826 issued and outstanding as of June 30 and March 31, 2022	48,308	48,308
Additional paid-in capital	19,263,619	19,256,485
Accumulated other comprehensive income	(656,673)	(318,120)
Retained earnings	44,887,746	45,578,456
Total shareholders’ equity	63,543,000	64,565,129
Total liabilities and shareholders’ equity	$ 65,074,195	$ 67,467,492

[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.