Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
CASH FLOWS PROVIDED BY (USED IN) OPERATING ACTIVITIES:
Net loss Including noncontrolling interest	$ (22,308,000)	$ (14,177,000)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	2,640,000	3,083,000
Goodwill, Impairment Loss	3,388,000	0
Increase in allowance for doubtful accounts	22,000	41,000
Loss on disposal of Grid business	254,000	0
Loss on disposal of fixed assets and asset impairment charges	5,101,000	24,000
Reduction in (Increase in) accrued investment income	18,000	(2,000)
Stock-based compensation	992,000	2,177,000
Change in operating assets and liabilities:
Accounts receivable	2,953,000	490,000
Inventories	1,217,000	3,686,000
Deferred cost of goods sold	242,000	(885,000)
Other current assets	312,000	565,000
Accounts payable	(543,000)	(2,332,000)
Accrued liabilities	(865,000)	3,617,000
Deferred revenues	(751,000)	1,181,000
Deferred rent	(29,000)	(28,000)
Net cash used in operating activities	(7,357,000)	(2,560,000)
CASH FLOWS PROVIDED BY (USED IN) INVESTING ACTIVITIES:
Purchases of available-for-sale short-term investments	(58,148,000)	(38,953,000)
Proceeds from maturities and sales of available-for-sale short-term investments	80,116,000	38,955,000
Change in other long-term assets	232,000	(62,000)
Cash paid for acquisition, net of cash acquired	(1,155,000)	0
Proceeds from divestiture of Grid business	4,861,000	0
Capital expenditures	(672,000)	(811,000)
Net cash provided by (used in) investing activities	25,234,000	(871,000)
CASH FLOWS PROVIDED BY (USED IN) FINANCING ACTIVITIES:
Principal payments of lease financing obligations	(1,676,000)	(1,530,000)
Proceeds from exercise of stock options	17,000	0
(Increase) Decrease in Restricted Cash and Investments Set Aside, Financing	(6,250,000)	0
Repurchase of common stock from employees for payment of taxes on vesting of restricted stock units and upon exercise of stock options	(411,000)	(423,000)
Net cash used in financing activities	(8,320,000)	(1,953,000)
EFFECT OF EXCHANGE RATE CHANGES ON CASH	(723,000)	178,000
NET CHANGE IN CASH AND CASH EQUIVALENTS	8,834,000	(5,206,000)
CASH AND CASH EQUIVALENTS:
Beginning of period	14,648,000	18,876,000
End of period	23,482,000	13,670,000
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Cash paid for interest on lease financing obligations	830,000	930,000
Cash paid for income taxes	265,000	318,000
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable	$ 715,000