Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Dec. 31, 2012		Dec. 31, 2011
Cash flows from operating activities:
Net loss	$ (8,488)		$ (7,925)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation expense	1,209		1,707
Depreciation and amortization	603		618
(Recovery of) provision for bad debt expenses	(4)		1
Debt cost expense	272	[1]	229	[1]
Loss on extinguishment of debt	1,244
Loss on disposal of fixed assets	51		39
Changes in assets and liabilities:
Accounts receivable	(684)		36
Inventories	(1,062)		508
Prepaid expenses and other current assets	(21)		63
Accounts payable	334		(518)
Accrued expenses	(325)		(48)
Accrued compensation	192		(37)
Deferred revenue	49
Advances from customers	(529)		(4,034)
Net cash used in operating activities	(7,159)		(9,361)
Cash flows from investing activities:
Purchases of property and equipment	(93)		(127)
Proceeds from disposal of fixed assets	5		3
Net cash used in investing activities	(88)		(124)
Cash flows from financing activities:
Proceeds from issuance of long-term debt—related party	5,000
Advance on line of credit—related party			3,000
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	99		399
Common stock repurchased	(36)		(11)
Payments of capital leases	(73)		(61)
Net cash provided by financing activities	5,868		3,322
Net decrease in cash and cash equivalents	(1,379)		(6,163)
Cash and cash equivalents at beginning of period	2,674		9,180
Cash and cash equivalents at end of period	1,295		3,017
Cash paid during the period for:
Interest	589		301
Income taxes	17		4
Non-cash financing activities:
Net transfers of inventory to fixed assets for use as demonstration equipment	151		281
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.