Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Mar. 31, 2012
Current assets:
Cash and cash equivalents	$ 788	$ 2,674
Accounts receivable, less allowances of $113 and $58, respectively	3,624	2,132
Inventories, net	5,158	3,970
Prepaid expenses and other current assets	276	197
Total current assets	9,846	8,973
Machinery and equipment	3,489	3,516
Demo equipment	1,101	1,070
Furniture and fixtures	225	224
Leasehold improvements	372	372
Property and equipment, at cost	5,187	5,182
Less—accumulated depreciation and amortization	3,733	3,149
Total property and equipment, net	1,454	2,033
Other assets, net	77	77
Deferred debt cost, net		1,516
Total assets	11,377	12,599
Current liabilities:
Accounts payable	1,300	587
Accrued expenses	728	944
Accrued compensation	656	657
Deferred revenue	130	135
Capital lease obligations	75	91
Advances from customers		537
Total current liabilities	2,889	2,951
Convertible debt—related party	17,000
Line of credit—related party		10,000
Deferred revenue, net of current portion	62
Capital lease obligations, net of current portion	22	97
Total liabilities	19,973	13,048
Commitments and Contingencies
Stockholders’ deficit:
Preferred stock, $0.01 par value Authorized—5,000 shares;issued and outstanding—none	0	0
Common stock, $0.01 par value Authorized—75,000 shares; issued— 46,249 shares and 45,396 shares, respectively	463	454
Additional paid-in capital	100,819	98,382
Treasury stock at cost, 34 shares and 7 shares of common stock, respectively	(50)	(14)
Accumulated deficit	(109,828)	(99,271)
Total stockholders’ deficit	(8,596)	(449)
Total liabilities and stockholders’ deficit	$ 11,377	$ 12,599