Balance Sheets - USD ($)	Mar. 31, 2016	Mar. 31, 2015
Current assets:
Cash and cash equivalents	$ 292,840	$ 258,656
Restricted cash	25,000	0
Accounts receivable, net of allowance for doubtful accounts of $9,000 at March 31, 2016 and $11,500 at March 31, 2015	839,850	965,355
Inventories, net of reserve for obsolescence of $410,000 at March 31, 2016 and $240,000 at March 31, 2015	1,730,747	2,337,654
Prepaid expenses	91,989	109,678
Total current assets	2,980,426	3,671,343
Equipment, at cost:
Furniture, fixtures and equipment	3,950,710	3,917,386
Accumulated depreciation	(3,389,533)	(3,140,453)
Equipment, net	561,177	776,933
Patents, net of accumulated amortization of $179,317 at March 31, 2016 and $153,494 at March 31, 2015	252,889	257,356
Other assets	15,926	20,135
TOTAL ASSETS	3,810,418	4,725,767
Current liabilities:
Accounts payable	355,890	675,411
Accrued compensation	246,203	262,195
Other accrued liabilities	257,506	324,926
Line of credit	387,491	0
Deferred rent	30,384	30,384
Total current liabilities	1,277,474	1,292,916
Long-term liabilities
Line of credit	0	64,000
Deferred rent	70,896	101,280
Total liabilities	1,348,370	1,458,196
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; 10,673,225 issued and outstanding at March 31, 2016 and 2015	23,682,365	23,607,688
Accumulated (deficit)	(21,220,317)	(20,340,117)
Total shareholders' equity	2,462,048	3,267,571
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 3,810,418	$ 4,725,767