Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Sep. 30, 2013		Sep. 30, 2012
Cash flows from operating activities:
Net loss	$ (3,757)		$ (6,911)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	362		406
Stock-based compensation expense	328	[1]	1,012
Provision for (recovery of) bad debt expenses	7		(7)
(Gain) loss on disposal of fixed assets	(5)		44
Debt cost expense			272
Loss on extinguishment of debt			1,244
Changes in assets and liabilities:
Accounts receivable	802		(600)
Inventories	(712)		(752)
Prepaid expenses and other current assets	(117)		(99)
Accounts payable	(112)		588
Accrued expenses	50		(303)
Accrued compensation	(96)		190
Deferred revenue	22		(7)
Advances from customers			(529)
Net cash used in operating activities	(3,228)		(5,452)
Cash flows from investing activities:
Purchases of property and equipment	(46)		(55)
Proceeds from disposal of fixed assets	3		5
Net cash used in investing activities	(43)		(50)
Cash flows from financing activities:
Proceeds from issuance of convertible debt—related party	3,000
Proceeds from promissory note—related party			5,000
Net proceeds from sale of common stock			878
Proceeds from exercise of stock options			85
Common stock repurchased	(28)		(24)
Payments of capital leases	(34)		(48)
Net cash provided by financing activities	2,938		5,891
Net (decrease) increase in cash and cash equivalents	(333)		389
Cash and cash equivalents at beginning of period	788		2,674
Cash and cash equivalents at end of period	455		3,063
Cash paid during the period for:
Interest	4		585
Income taxes	3		7
Non-cash financing activities:
Net transfers of inventory to fixed assets for use as demonstration equipment	$ 187		$ 91

[1] Reflects reversal of stock-based compensation expense of $289 thousand for the cancellation of unvested stock options granted to our former President and Chief Executive Officer, Cynthia F. Ansari.