Condensed Balance Sheets (Unaudited) - USD ($)	Jun. 30, 2021	Mar. 31, 2021
Current assets:
Cash	$ 1,328,669	$ 1,474,339
Accounts receivable, net of allowance for doubtful accounts of $10,000 at June 30, 2021 and $35,000 at March 31, 2021	1,140,971	1,024,370
Inventories, net of reserve for obsolescence of $21,000 at June 30, 2021 and $70,000 at March 31, 2021	1,590,948	1,445,134
Prepaid expenses and other assets	104,452	154,151
Total current assets	4,165,040	4,097,994
Equipment:
Furniture, fixtures and equipment, at cost	2,699,106	2,695,297
Accumulated depreciation	(2,441,546)	(2,429,580)
Equipment, net	257,560	265,717
Right of use asset	993,731	1,060,971
Patents, net of accumulated amortization of $243,488 at June 30, 2021 and $317,821 at March 31, 2021	209,023	213,368
Other assets	26,146	20,496
TOTAL ASSETS	5,651,500	5,658,546
Current liabilities:
Accounts payable	521,026	389,088
Secured notes	21,170	20,397
Accrued compensation	215,659	181,686
Other accrued liabilities	182,914	282,102
Accrued lease liability	310,421	302,978
Total current liabilities	1,251,190	1,176,251
Long-term liability:
Secured notes	216,150	220,263
Accrued lease liability	847,438	926,808
Unsecured promissory note	533,118	533,118
Total liabilities	2,847,896	2,856,440
Shareholders’ equity:
Preferred stock, no par value: 10,000,000 shares authorized; none issued and outstanding	0	0
Common stock and additional paid-in capital, no par value: 100,000,000 shares authorized; 11,582,641 issued and outstanding at June 30, 2021 and March 31,2021	24,274,171	24,265,831
Accumulated (deficit)	(21,470,567)	(21,463,725)
Total shareholders’ equity	2,803,604	2,802,106
TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY	$ 5,651,500	$ 5,658,546