Consolidated Statements of Cash Flows (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Net income	$ 4,424	$ 722
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	2,251	2,440
Amortization	677	665
(Gain) loss on equipment disposals	(2)	28
Gain on revaluation of ACT liability	(758)	(768)
Deferred income taxes	410	(1,299)
Stock based compensation	2,197	3,769
Bad debt expense	32	2
Changes in operating assets and liabilities:
Accounts receivable	(6,502)	(4,437)
Inventories	(44)	(451)
Prepaid expenses, other current assets and other noncurrent assets	199	(376)
Accounts payable	846	65
Accrued liabilities and other noncurrent liabilities	(666)	4,368
Net cash provided by operating activities	3,064	4,728
Investing Activities
Decrease in restricted cash		200
Proceeds from the sale of equipment	2
Purchases of property, equipment and patents	(1,700)	(1,305)
Net cash (used in) investing activities	(1,698)	(1,105)
Financing Activities
Proceeds from exercise of stock options	336	10
Payments on short-term debt		(686)
Payments to repurchase common stock	(3,367)
Excess income tax benefits from exercise of stock options	74
Redemption of nil coupon loan note		(5)
Net cash (used in) financing activities	(2,957)	(681)
Effect of exchange rate fluctuations on cash	65	(12)
Net (decrease) increase in cash and cash equivalents	(1,526)	2,930
Cash and cash equivalents at beginning of period	30,524	20,965
Cash and cash equivalents at end of period	$ 28,998	$ 23,895