Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Mar. 31, 2011
Current assets:
Cash and cash equivalents	$ 2,674	$ 9,180
Accounts receivable, less allowances of $58 and $56, respectively	2,132	1,592
Inventories, net	3,970	6,096
Prepaid expenses and other current assets	197	332
Total current assets	8,973	17,200
Machinery and equipment	3,516	3,182
Demo equipment	1,070	1,413
Furniture and fixtures	224	224
Leasehold improvements	372	372
Property and equipment, at cost	5,182	5,191
Less—accumulated depreciation and amortization	3,149	2,970
Total property and equipment, net	2,033	2,221
Other assets, net	77	73
Deferred debt cost, net	1,516	272
Total assets	12,599	19,766
Current liabilities:
Capital lease obligations	91	65
Accounts payable	587	921
Accrued expenses	944	782
Accrued compensation	657	706
Advances from customers	672	5,693
Total current liabilities	2,951	8,167
Line of credit—related party	10,000	5,000
Capital lease obligations, net of current portion	97	75
Total liabilities	13,048	13,242
Stockholders’ (deficit) equity:
Common stock, $0.01 par value Authorized—75,000 shares; issued and outstanding—45,396 shares and 44,025 shares, respectively	454	440
Additional paid-in capital	98,382	94,339
Treasury stock at cost, 7 shares of common stock and none, respectively	(14)
Accumulated deficit	(99,271)	(88,255)
Total stockholders’ (deficit) equity	(449)	6,524
Total liabilities and stockholders’ (deficit) equity	$ 12,599	$ 19,766