Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Cash flows from operating activities:
Net loss	$ (1,977)	$ (2,434)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	166	188
Stock-based compensation expense	154	555
Provision for bad debt expense	44	8
Amortization of debt discount	26
Loss on disposal of fixed assets	6	3
Changes in assets and liabilities:
Accounts receivable	458	931
Inventories	(178)	(191)
Prepaid expenses and other current assets	17	(85)
Accounts payable	(72)	(483)
Accrued expenses	3	(133)
Accrued compensation	205	210
Deferred revenue	203	12
Net cash used in operating activities	(945)	(1,419)
Cash flows from investing activities:
Purchases of property and equipment	(25)
Net cash used in investing activities	(25)
Cash flows from financing activities:
Proceeds from issuance of convertible debt-related party	1,000	2,000
Proceeds from exercise of stock options	23
Common stock repurchased	(7)	(18)
Payments of capital leases	(13)	(19)
Net cash provided by financing activities	1,003	1,963
Net increase in cash and cash equivalents	33	544
Cash and cash equivalents at beginning of period	1,237	788
Cash and cash equivalents at end of period	1,270	1,332
Non-cash financing activities:
Net transfers of inventory to fixed assets for use as demonstration equipment	$ 180	$ 116