Condensed Balance Sheets (Unaudited) - USD ($)	Sep. 30, 2017	Mar. 31, 2017
Current assets:
Cash and cash equivalents	$ 128,762	$ 45,117
Restricted cash	25,000	50,000
Accounts receivable, net of allowance for doubtful accounts of $9,000 at September 30, 2017 and $33,000 at March 31, 2017	920,773	1,042,281
Inventories, net of reserve for obsolescence of $40,000 at September 30, 2017 and $50,000 at March 31, 2017	1,214,107	1,128,412
Prepaid expenses	152,949	62,290
Total current assets	2,441,591	2,328,100
Equipment, at cost:
Furniture, fixtures and equipment	3,167,129	3,161,687
Accumulated depreciation	(2,771,394)	(2,693,302)
Equipment, net	395,735	468,385
Patents, net of accumulated amortization of $225,748 at September 30, 2017 and $212,345 at March 31, 2017	264,579	253,980
Other assets	17,690	16,450
TOTAL ASSETS	3,119,595	3,066,915
Current liabilities:
Accounts payable	405,684	402,914
Accrued compensation	250,666	267,399
Other accrued liabilities	274,179	248,130
Line of credit	0	275,055
Deferred rent	30,384	30,384
Total current liabilities	960,913	1,223,882
Long-term liability:
Deferred rent	25,320	40,512
Total liabilities	986,233	1,264,394
Commitments and contingencies (Note 4)	0	0
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; 10,683,355 shares issued and outstanding at September 30, 2017 and March 31, 2017	23,785,323	23,752,131
Accumulated (deficit)	(21,651,961)	(21,949,610)
Total shareholders' equity	2,133,362	1,802,521
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 3,119,595	$ 3,066,915