Consolidated Statements of Cash Flows (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Net income (loss)	$ 1,769	$ (95)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation	1,534	1,626
Amortization	455	443
(Gain) loss on equipment disposals	(2)	6
Gain on revaluation of ACT liability	(758)
Deferred income taxes	(253)	(887)
Stock based compensation	1,696	2,569
Bad debt expense	70	2
Changes in operating assets and liabilities:
Accounts receivable	(185)	(4,435)
Inventories	168	5
Prepaid expenses, other current assets and other noncurrent assets	37	32
Accounts payable	(935)	12
Accrued liabilities and other noncurrent liabilities	(2,675)	2,099
Net cash provided by operating activities	921	1,377
Investing Activities
Decrease in restricted cash		200
Proceeds from the sale of equipment	2
Purchases of property, equipment and patents	(1,242)	(642)
Net cash (used in) investing activities	(1,240)	(442)
Financing Activities
Proceeds from exercise of stock options	313	10
Payments on debt		(722)
Redemption of nil coupon loan note		(5)
Net cash provided by (used in) financing activities	313	(717)
Effect of exchange rate fluctuations on cash	129	(117)
Net increase in cash and cash equivalents	123	101
Cash and cash equivalents at beginning of period	30,524	20,965
Cash and cash equivalents at end of period	$ 30,647	$ 21,066