Condensed Consolidated Balance Sheets (Current Period Unaudited) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Mar. 31, 2013
Current assets:
Cash and cash equivalents	$ 1,332	$ 788
Accounts receivable, less allowances of $89 and $113, respectively	2,685	3,624
Inventories, net	5,236	5,158
Prepaid expenses and other current assets	361	276
Total current assets	9,614	9,846
Machinery and equipment	3,489	3,489
Demo equipment	1,198	1,101
Furniture and fixtures	225	225
Leasehold improvements	372	372
Property and equipment, at cost	5,284	5,187
Less—accumulated depreciation and amortization	3,905	3,733
Total property and equipment, net	1,379	1,454
Other assets, net	77	77
Total assets	11,070	11,377
Current liabilities:
Accounts payable	820	1,300
Accrued expenses	595	728
Accrued compensation	866	656
Deferred revenue	140	130
Capital lease obligations	69	75
Total current liabilities	2,490	2,889
Convertible debt - related party	19,000	17,000
Deferred revenue, net of current portion	64	62
Capital lease obligations, net of current portion	9	22
Total liabilities	21,563	19,973
Commitments and Contingencies
Stockholders’ deficit:
Common stock, $0.01 par value Authorized—75,000 shares; issued and outstanding—46,249 shares and 46,249 shares, respectively	463	463
Additional paid-in capital	101,374	100,819
Treasury stock at cost, 49 and 34 shares of common stock, respectively	(68)	(50)
Accumulated deficit	(112,262)	(109,828)
Total stockholders’ deficit	(10,493)	(8,596)
Total liabilities and stockholders’ deficit	$ 11,070	$ 11,377