Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Cash flows from operating activities
Net income (loss)	$ 174	$ (8,988)
Adjustments to reconcile net income (loss) to net cash used for operating activities:
Depreciation and amortization	1,140	1,394
Gain on sale of dry strip assets and intellectual property		(368)
Deferred taxes	312	56
Stock-based compensation expense	1,172	839
Provision for excess inventory	59	2,211
Changes in operating assets & liabilities
Accounts receivable	(1,634)	1,458
Inventories	(52)	(1,672)
Prepaid expenses and other current assets	(1,252)	(544)
Accounts payable and other current liabilities	(2,025)	5,043
Deferred revenue	(614)	(843)
Income taxes	61	84
Other assets and liabilities	(1,304)	(549)
Net cash used for operating activities	(3,963)	(1,879)
Cash flows from investing activities
Proceeds from sale of dry strip assets and intellectual property		400
Expenditures for property, plant, and equipment	(227)	(150)
Decrease in restricted cash		3
Net cash (used for) provided by investing activities	(227)	253
Cash flows from financing activities
Proceeds from exercise of stock options	1,277	49
Net cash provided by financing activities	1,277	49
Effect of exchange rate changes on cash	(338)	(968)
Net decrease in cash and cash equivalents	(3,251)	(2,545)
Cash and cash equivalents at beginning of period	46,290	44,986
Cash and cash equivalents at end of period	$ 43,039	$ 42,441