Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Cash flows from operating activities:
Net loss	$ (735)	$ (1,034)
Reconciliation of net loss to net cash used in operating activities:
Depreciation	83	77
Amortization of license fee	25	25
Stock-based compensation expense	77	103
Provision for write down of inventory	12	36
Amortization of debt issuance costs	40	40
Changes in operating assets and liabilities:
Accounts receivable	(370)	(312)
Inventories	(16)	(74)
Prepaid expenses and other current assets	120	110
Accounts payable and accrued expenses	97	98
Deferred income	195	(2)
Net cash used in operating activities	(472)	(933)
Cash flows from investing activities:
Capital expenditures	(139)	(49)
Deposits for capital expenditures	(115)
Net cash used in investing activities	(254)	(49)
Cash flows from financing activities:
Proceeds from note payable, related party		500
Principal payments on capital lease obligation	(9)	(7)
Proceeds from exercise of common stock options	9	13
Net cash provided by financing activities		506
Net decrease in cash and cash equivalents	(726)	(476)
Cash and cash equivalents at beginning of period	2,914	5,116
Cash and cash equivalents at end of period	2,188	4,640
Supplemental cash flow information:
Cash payments for interest	19	3
Cash payment for taxes	7	6
Equipment financed through capital lease	$ 30