Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
CASH FLOWS PROVIDED BY (USED IN) OPERATING ACTIVITIES:
Net loss Including noncontrolling interest	$ (14,177)	$ (8,869)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	3,083	5,308
Increase in allowance for doubtful accounts	41	17
Loss on disposal of fixed assets	24	0
Increase in accrued investment income	(2)	(3)
Stock-based compensation	2,177	5,565
Change in operating assets and liabilities:
Accounts receivable	490	18,244
Inventories	3,686	587
Deferred cost of goods sold	(885)	5,611
Other current assets	565	981
Accounts payable	(2,332)	(9,279)
Accrued liabilities	3,617	(3,597)
Deferred revenues	1,181	(7,290)
Deferred rent	(28)	(33)
Net cash (used in) provided by operating activities	(2,560)	7,242
CASH FLOWS PROVIDED BY (USED IN) INVESTING ACTIVITIES:
Purchases of available-for-sale short-term investments	(38,953)	(66,947)
Proceeds from maturities and sales of available-for-sale short-term investments	38,955	63,970
Change in other long-term assets	(62)	(20)
Capital expenditures	(811)	(814)
Net cash used in investing activities	(871)	(3,811)
CASH FLOWS PROVIDED BY (USED IN) FINANCING ACTIVITIES:
Principal payments of lease financing obligations	(1,530)	(1,461)
Proceeds from exercise of stock options	0	0
Proceeds from noncontrolling interests	0	294
Repurchase of common stock from employees for payment of taxes on vesting of restricted stock units and upon exercise of stock options	(423)	(1,249)
Net cash used in financing activities	(1,953)	(2,416)
EFFECT OF EXCHANGE RATE CHANGES ON CASH	178	13
NET CHANGE IN CASH AND CASH EQUIVALENTS	(5,206)	1,028
CASH AND CASH EQUIVALENTS:
Beginning of period	18,876	17,658
End of period	13,670	18,686
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Cash paid for interest on lease financing obligations	930	1,024
Cash paid for income taxes	$ 318	$ 241