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Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Allowance for bad debts	$ 868,000us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent	$ 1,060us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Preferred stock - par value	$ 0.001us-gaap_PreferredStockParOrStatedValuePerShare	$ 0.001us-gaap_PreferredStockParOrStatedValuePerShare
Preferred stock - shares authorized	5,000,000us-gaap_PreferredStockSharesAuthorized	5,000,000us-gaap_PreferredStockSharesAuthorized
Preferred stock - shares issued	0us-gaap_PreferredStockSharesIssued	0us-gaap_PreferredStockSharesIssued
Common stock - par value	$ 0.001us-gaap_CommonStockParOrStatedValuePerShare	$ 0.001us-gaap_CommonStockParOrStatedValuePerShare
Common stock - shares authorized	75,000,000us-gaap_CommonStockSharesAuthorized	75,000,000us-gaap_CommonStockSharesAuthorized
Common stock - shares issued	33,477,810us-gaap_CommonStockSharesIssued	32,606,228us-gaap_CommonStockSharesIssued
Common stock - shares outstanding	29,060,225us-gaap_CommonStockSharesOutstanding	28,188,643us-gaap_CommonStockSharesOutstanding
Treasury stock - shares	4,417,585us-gaap_TreasuryStockShares	4,417,585us-gaap_TreasuryStockShares

X

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A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

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