Condensed Balance Sheets (USD $)	Jun. 30, 2012	Mar. 31, 2012
Current assets:
Cash and cash equivalents	$ 463,154	$ 564,671
Accounts receivable, net of allowance for doubtful accounts of $4,500 at June 30, 2012 and $15,500 at March 31, 2012	1,287,277	1,427,966
Inventories, net of reserve for obsolescence of $125,000 at June 30, 2012 and $117,000 at March 31, 2012	2,377,589	2,489,008
Prepaid expenses	152,660	28,568
Total current assets	4,280,680	4,510,213
Equipment, at cost:
Furniture, fixtures and equipment	2,546,687	2,497,471
Customer-site equipment	819,403	819,403
Equipment-in-progress	794,391	777,839
Accumulated depreciation	(2,545,988)	(2,476,004)
Equipment, net	1,614,493	1,618,709
Patents, net of accumulated amortization of $171,714 at June 30, 2012 and $169,084 at March 31, 2012	275,989	272,714
Other assets	7,415	7,415
TOTAL ASSETS	6,178,577	6,409,051
Current liabilities:
Accounts payable	452,135	1,039,923
Accrued compensation	329,023	283,366
Other accrued liabilities	403,108	349,136
Total current liabilities	1,184,266	1,672,425
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; 8,210,100 shares issued and outstanding at June 30, 2012 and 7,955,100 at March 31, 2012	21,544,021	21,296,646
Accumulated (deficit)	(16,549,710)	(16,560,020)
Total shareholders' equity	4,994,311	4,736,626
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 6,178,577	$ 6,409,051