Consolidated Statements of Comprehensive Loss (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Net loss	$ (10,612)us-gaap_NetIncomeLoss	$ (4,747)us-gaap_NetIncomeLoss	$ (6,548)us-gaap_NetIncomeLoss
Available-for-sale investments
Net change in unrealized gain (loss) on available-for-sale investments	(42)	(21)	959
Less: Reclassification adjustment for net gains on investments recognized during the year	(4)	(9)	(19)
Net change in unrealized gain (loss) on available-for-sale investments	(46)	(30)	940
Tax provision (benefit)			18us-gaap_OtherComprehensiveIncomeLossTax
Other comprehensive income (loss), net of tax	(46)	(30)	922
Comprehensive loss	$ (10,658)	$ (4,777)	$ (5,626)

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

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Amount before tax and reclassification adjustments of unrealized holding gain (loss) on available-for-sale securities and unrealized holding gain (loss) related to transfers of securities into the available-for-sale classification and out of the held-to-maturity classification.

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Amount before tax, after reclassification adjustments, of appreciation (loss) in value of unsold available-for-sale securities. Excludes amounts related to other than temporary impairment (OTTI) loss.

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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 of tax expense (benefit) allocated to other comprehensive income (loss).

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