Consolidated Balance Sheets Consolidated Balance Sheets - (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]
Allowance for doubtful accounts and sales returns	$ 1,615	$ 782
Preferred stock, par value per share	$ 0.001	$ 0.001
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 per share	$ 0.001	$ 0.001
Common stock, shares authorized	120,000,000us-gaap_CommonStockSharesAuthorized	60,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares, issued	42,060,865us-gaap_CommonStockSharesIssued	41,230,286us-gaap_CommonStockSharesIssued
Common stock, shares, outstanding	42,060,865us-gaap_CommonStockSharesOutstanding	41,230,286us-gaap_CommonStockSharesOutstanding

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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