Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Sep. 30, 2012		Sep. 30, 2011
Cash flows from operating activities:
Net loss	$ (6,911)		$ (5,583)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation expense	1,012		1,387
Depreciation and amortization	406		402
(Recovery of) provision for bad debt expenses	(7)		17
Debt cost expense	272	[1]	84	[1]
Loss on extinguishment of debt	1,244
Loss on disposal of fixed assets	44		6
Changes in assets and liabilities:
Accounts receivable	(600)		(97)
Inventories	(752)		(429)
Prepaid expenses and other current assets	(99)		(44)
Accounts payable	588		(173)
Accrued expenses	(303)		(245)
Accrued compensation	190		55
Deferred revenue	(7)
Advances from customers	(529)		(2,846)
Net cash used in operating activities	(5,452)		(7,466)
Cash flows from investing activities:
Purchases of property and equipment	(55)		(106)
Proceeds from disposal of fixed assets	5		3
Net cash used in investing activities	(50)		(103)
Cash flows from financing activities:
Proceeds from issuance of long-term debt—related party	5,000
Advance on line of credit—related party			1,000
Payment of costs related to line of credit—related party			(5)
Net proceeds from sale of common stock	878
Proceeds from exercise of stock options	85		302
Common stock repurchased	(24)		(7)
Payments of capital leases	(48)		(35)
Net cash provided by financing activities	5,891		1,255
Net increase (decrease) in cash and cash equivalents	389		(6,314)
Cash and cash equivalents at beginning of period	2,674		9,180
Cash and cash equivalents at end of period	3,063		2,866
Cash paid during the period for:
Interest	585		196
Income taxes	7		3
Non-cash financing activities:
Net transfers of inventory to fixed assets for use as demonstration equipment	91		218
Capital lease entered into for equipment purchase			135
Issuance of stock warrants with line of credit—related party			$ 1,611

[1] Expense through September 19, 2012.