Condensed Balance Sheets - USD ($)	Sep. 30, 2015	Mar. 31, 2015
Current assets:
Cash and cash equivalents	$ 113,193	$ 258,656
Accounts receivable, net of allowance for doubtful accounts of $11,000 at September 30, 2015 and $11,500 at March 31, 2015	870,773	965,355
Inventories, net of reserve for obsolescence of $262,000 at September 30, 2015 and $240,000 at March 31, 2015	1,974,197	2,337,654
Prepaid expenses	124,407	109,678
Total current assets	3,082,570	3,671,343
Equipment, at cost:
Furniture, fixtures and equipment	3,906,155	3,917,386
Accumulated depreciation	(3,268,609)	(3,140,453)
Equipment, net	637,546	776,933
Patents, net of accumulated amortization of $165,157 at September 30, 2015 and $153,494 at March 31, 2015	256,274	257,356
Other assets	15,792	20,135
TOTAL ASSETS	3,992,182	4,725,767
Current liabilities:
Accounts payable	463,748	675,411
Accrued compensation	234,294	262,195
Other accrued liabilities	270,010	324,926
Deferred rent - short term	30,384	30,384
Total current liabilities	998,436	1,292,916
Long-term liabilities:
Line of credit		64,000
Deferred rent - long term	86,088	101,280
Total liabilities	$ 1,084,524	$ 1,458,196
Commitments and contingencies
Shareholders' equity:
Preferred stock, no par value: 10,000,000 shares authorized; none issued and outstanding
Common stock and additional paid-in capital, no par value: 100,000,000 shares authorized; 10,673,225 shares issued and outstanding at September 30, 2015 and March 31, 2015	$ 23,645,283	$ 23,607,688
Accumulated (deficit)	(20,737,625)	(20,340,117)
Total shareholders' equity	2,907,658	3,267,571
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 3,992,182	$ 4,725,767