Condensed Consolidated Balance Sheets (Current Period Unaudited) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Mar. 31, 2014
Current assets:
Cash and cash equivalents	$ 1,270	$ 1,237
Accounts receivable, less allowances of $174 and $117, respectively	3,316	3,818
Inventories, net	4,192	4,194
Prepaid expenses and other current assets	438	455
Total current assets	9,216	9,704
Machinery and equipment	3,467	3,456
Demo equipment	1,456	1,311
Furniture and fixtures	237	225
Leasehold improvements	372	372
Property and equipment, at cost	5,532	5,364
Less—accumulated depreciation and amortization	(4,437)	(4,302)
Total property and equipment, net	1,095	1,062
Other assets, net	67	67
Total assets	10,378	10,833
Current liabilities:
Accounts payable	1,145	1,217
Accrued expenses	921	918
Accrued compensation	679	474
Deferred revenue	303	210
Capital lease obligations	9	22
Total current liabilities	3,057	2,841
Convertible debt—related party	23,440	22,414
Deferred revenue, net of current portion	203	93
Total liabilities	26,700	25,348
Commitments and Contingencies
Preferred stock, $0.01 par value
Authorized—5,000 shares; issued and outstanding - none
Common stock, $0.01 par value
Authorized—75,000 shares; issued and outstanding—47,620 shares and 47,614 shares, respectively	476	476
Additional paid-in capital	102,806	102,629
Treasury stock at cost, 65 and 59 shares of common stock, respectively	(85)	(78)
Accumulated deficit	(119,519)	(117,542)
Total stockholders’ deficit	(16,322)	(14,515)
Total liabilities and stockholders’ deficit	$ 10,378	$ 10,833