SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Allowance for Bad Debts [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning Balance	$ 294	$ 268
Additions	354	92
Write-offs	158	66
Ending Balance	490	294
Allowance for Customer Credits [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning Balance	111	158
Additions	1,037	511
Write-offs	868	558
Ending Balance	280	111
Tax Valuation Allowance [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning Balance	6,356	43,883
Charged (credit) to tax expense	(341)	(37,527)
Ending Balance	$ 6,015	$ 6,356

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Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 09

-Article 12

+ Details

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- Definition

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- Definition

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