BALANCE SHEETS - USD ($)	Mar. 31, 2023	Mar. 31, 2022
Current assets
Cash and cash equivalents	$ 1,669,896	$ 10,449,510
Marketable securities, short-term	15,513,095	20,839,683
Accounts receivable, net of allowance for uncollectible accounts of $15,000	6,523,344	4,704,829
Inventories	6,417,010	5,088,635
Prepaid expenses and other assets	663,459	420,520
Total current assets	30,786,804	41,503,177
Fixed assets
Machinery and equipment	10,484,365	9,739,244
Leasehold improvements	1,956,309	1,810,872
Less accumulated depreciation and amortization	11,095,236	10,943,731
Net fixed assets	1,345,438	606,385
Deferred tax assets	572,038	483,469
Marketable securities, long-term	36,125,047	24,314,211
Right-of-use asset - operating lease	425,843	560,250
Total assets	69,255,170	67,467,492
Current liabilities
Accounts payable	281,712	943,535
Accrued payroll and other	1,375,250	1,356,689
Operating lease	175,798	156,121
Total current liabilities	1,832,760	2,456,345
Operating lease	342,908	446,018
Total liabilities	2,175,668	2,902,363
Shareholders' equity
Common Stock, Value	48,308	48,308
Additional paid-in capital	19,295,442	19,256,485
Accumulated other comprehensive income (loss)	(1,213,858)	(318,120)
Retained earnings	48,949,610	45,578,456
Total shareholders' equity	67,079,502	64,565,129
Total liabilities and shareholders' equity	$ 69,255,170	$ 67,467,492