Condensed Consolidated Balance Sheets (Current Period Unaudited) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Mar. 31, 2012
ASSETS
Cash and cash equivalents	$ 1,295	$ 2,674
Accounts receivable, less allowances of $75 and $58, respectively	2,820	2,132
Inventories, net	4,881	3,970
Prepaid expenses and other current assets	218	197
Total current assets	9,214	8,973
Machinery and equipment	3,488	3,516
Demo equipment	1,091	1,070
Furniture and fixtures	225	224
Leasehold improvements	372	372
Property and equipment, at cost	5,176	5,182
Less—accumulated depreciation and amortization	3,558	3,149
Total property and equipment, net	1,618	2,033
Deferred debt cost, net		1,516
Other assets, net	77	77
Total assets	10,909	12,599
LIABILITIES AND STOCKHOLDERS' DEFICIT
Accounts payable	921	587
Accrued compensation	849	657
Accrued expenses	619	944
Deferred revenue	125
Capital lease obligations	76	91
Advances from customers		672
Total current liabilities	2,590	2,951
Convertible debt—related party	15,000
Line of credit—related party		10,000
Deferred revenue, net of current portion	67
Capital lease obligations, net of current portion	39	97
Total liabilities	17,696	13,048
Commitments and Contingencies
Stockholders’ deficit:
Common stock, $0.01 par value Authorized—75,000 shares; issued and outstanding—46,249 shares and 45,396 shares, respectively	462	454
Additional paid-in capital	100,560	98,382
Treasury stock at cost, 34 shares and 7 shares of common stock, respectively	(50)	(14)
Accumulated deficit	(107,759)	(99,271)
Total stockholders’ deficit	(6,787)	(449)
Total liabilities and stockholders’ deficit	$ 10,909	$ 12,599