Condensed Consolidated Balance Sheets (USD $) In Thousands	Jun. 30, 2011	Mar. 31, 2011
Current assets:
Cash and cash equivalents	$ 5,191	$ 9,180
Accounts receivable, net of allowance for doubtful accounts of $74 and $56, respectively	1,170	1,592
Inventories, net	6,763	6,096
Prepaid expenses and other current assets	426	332
Total current assets	13,550	17,200
Machinery and equipment	3,394	3,182
Demonstration equipment	960	1,413
Furniture and fixtures	224	224
Leasehold improvements	372	372
Total property and equipment, at cost	4,950	5,191
Less—accumulated depreciation and amortization	2,597	2,970
Total property and equipment, net	2,353	2,221
Other assets, net of accumulated amortization of $91 and $90, respectively	72	73
Deferred debt cost, net of accumulated amortization of $213 and $172, respectively	231	272
Total assets	16,206	19,766
Current liabilities:
Capital lease obligations	103	65
Accounts payable	848	921
Accrued expenses	624	782
Accrued compensation	872	706
Advances from customers	4,032	5,693
Total current liabilities	6,479	8,167
Line of credit—related party	5,000	5,000
Capital lease obligations, net of current portion	154	75
Total liabilities	11,633	13,242
Stockholders’ equity:
Common stock, $0.01 par value— Authorized—75,000 shares Issued—44,432 shares and 44,025 shares, respectively	444	440
Additional paid-in capital	95,018	94,339
Treasury stock at cost, 2 shares and none, respectively	(4)
Accumulated deficit	(90,885)	(88,255)
Total stockholders’ equity	4,573	6,524
Total liabilities and stockholders’ equity	$ 16,206	$ 19,766