BALANCE SHEETS - USD ($)	Mar. 31, 2024	Mar. 31, 2023
Current assets
Cash and cash equivalents	$ 10,283,550	$ 1,669,896
Marketable securities, short-term (amortized cost of $12,283,630 as of March 31, 2024, and $15,696,135 as of March 31, 2023)	11,917,779	15,513,095
Accounts receivable, net of allowance for credit losses of $15,000	3,144,833	6,523,344
Inventories	7,158,585	6,417,010
Prepaid expenses and other assets	689,349	663,459
Total current assets	33,194,096	30,786,804
Fixed assets
Machinery and equipment	10,501,096	10,484,365
Leasehold improvements	1,956,309	1,956,309
Less accumulated depreciation and amortization	11,403,383	11,095,236
Net fixed assets	1,054,022	1,345,438
Deferred tax assets	1,453,704	572,038
Marketable securities, long-term (amortized cost of $31,417,890 as of March 31, 2024, and $37,495,846 as of March 31, 2023)	30,788,301	36,125,047
Right-of-use asset - operating lease	289,910	425,843
Total assets	66,780,033	69,255,170
Current liabilities
Accounts payable	127,154	281,712
Accrued payroll and other	729,215	1,375,250
Operating lease	179,372	175,798
Total current liabilities	1,035,741	1,832,760
Operating lease	175,775	342,908
Total liabilities	1,211,516	2,175,668
Shareholders' equity
Common Stock, Value	48,337	48,308
Additional paid-in capital	19,554,812	19,295,442
Accumulated other comprehensive income (loss)	(777,637)	(1,213,858)
Retained earnings	46,743,005	48,949,610
Total shareholders' equity	65,568,517	67,079,502
Total liabilities and shareholders' equity	$ 66,780,033	$ 69,255,170