Balance Sheets (USD $)	Mar. 31, 2014	Mar. 31, 2013
Current assets:
Cash and cash equivalents	$ 1,689,580	$ 126,224
Accounts receivable, net of allowance for doubtful accounts of $8,000 at March 31, 2014 and $9,000 at March 31, 2013	863,220	985,770
Inventories, net of reserve for obsolescence of $560,000 at March 31, 2014 and $51,000 at March 31, 2013	2,224,228	2,929,302
Prepaid expenses	65,387	65,891
Total current assets	4,842,415	4,107,187
Equipment, at cost:
Furniture, fixtures and equipment	3,535,979	2,691,057
Customer-site equipment	1,016,265	931,060
Equipment-in-progress	105,058	774,004
Accumulated depreciation	(3,552,079)	(2,767,195)
Equipment, net	1,105,223	1,628,926
Patents, net of accumulated amortization of $215,969 at March 31, 2014 and $190,770 at March 31, 2013	248,971	237,606
Other assets	14,127	9,215
TOTAL ASSETS	6,210,736	5,982,934
Current liabilities:
Accounts payable	666,159	823,347
Accrued compensation	264,595	319,116
Other accrued liabilities	408,549	446,171
Lease payable - short term	67,057
Deferred rent - short term	30,384
Total current liabilities	1,436,744	1,588,634
Lease payable - long term	54,619
Deferred rent - long term	131,664
Total liabilities	1,623,027	1,588,634
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 and 8,210,100 shares issued and outstanding at March 31, 2014 and 2013, respectively	23,545,080	21,569,993
Accumulated (deficit)	(18,957,371)	(17,175,693)
Total shareholders' equity	4,587,709	4,394,300
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 6,210,736	$ 5,982,934