CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Comprehensive Income [Abstract]
Net loss	$ (5,149)us-gaap_ProfitLoss	$ (35,525)us-gaap_ProfitLoss	$ (39,362)us-gaap_ProfitLoss
Other comprehensive income (loss), before taxes:
Unrealized net gain (loss) on available-for-sale securities	(14)	(43)	4,388
Reclassification adjustment for gain from available-for-sale securities changed to fair value	0	0	(4,607)
Reclassification adjustment for other than temporary impairment of available-for-sale securities included in net loss	14	43	260
Total comprehensive loss	$ (5,149)us-gaap_ComprehensiveIncomeNetOfTax	$ (35,525)us-gaap_ComprehensiveIncomeNetOfTax	$ (39,321)us-gaap_ComprehensiveIncomeNetOfTax

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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Amount before tax of reclassification adjustment from accumulated other comprehensive income for unrealized gain (loss) realized upon the sale of available-for-sale securities.

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Amount before tax of reclassification adjustment from accumulated other comprehensive income for unrealized loss realized upon the write-down of available-for-sale securities.

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Amount before tax and reclassification adjustments of unrealized holding gain (loss) on available-for-sale securities.

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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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