Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Cash flows from operating activities:
Net loss	$ (2,434)	$ (2,647)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	188	204
Stock-based compensation expense	555	443
Provision for (recovery of) bad debt expenses	8	(9)
Debt cost expense		144
Loss on disposal of fixed assets	3	6
Changes in assets and liabilities:
Accounts receivable	931	(54)
Inventories	(191)	(310)
Prepaid expenses and other current assets	(85)	(70)
Accounts payable	(483)	241
Accrued expenses	(133)	(110)
Accrued compensation	210	143
Deferred revenue	12	27
Advances from customers		(368)
Net cash used in operating activities	(1,419)	(2,360)
Cash flows from investing activities:
Purchases of property and equipment		(36)
Proceeds from disposal of fixed assets		6
Net cash used in investing activities		(30)
Cash flows from financing activities:
Proceeds from exercise of stock options		6
Net proceeds from sale of common stock		878
Proceeds from issuance of convertible debt – related party	2,000
Common stock repurchased	(18)
Payments of capital leases	(19)	(24)
Net cash provided by financing activities	1,963	860
Net increase (decrease) in cash and cash equivalents	544	(1,530)
Cash and cash equivalents at beginning of period	788	2,674
Cash and cash equivalents at end of period	1,332	1,144
Cash paid during the period for:
Interest		157
Income taxes		7
Non-cash financing activities:
Net transfers of inventory to fixed assets for use as demo equipment	$ 116	$ 57