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	$ 215	$ 410
Preferred stock, par value	$ 0.0001	$ 0.0001
Preferred stock, shares authorized	5,000,000us-gaap_PreferredStockSharesAuthorized	5,000,000us-gaap_PreferredStockSharesAuthorized
Preferred stock, shares issued	0us-gaap_PreferredStockSharesIssued	0us-gaap_PreferredStockSharesIssued
Preferred stock, shares outstanding	0us-gaap_PreferredStockSharesOutstanding	0us-gaap_PreferredStockSharesOutstanding
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	145,000,000us-gaap_CommonStockSharesAuthorized	145,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued	26,895,480us-gaap_CommonStockSharesIssued	25,206,498us-gaap_CommonStockSharesIssued
Common stock, shares outstanding	26,895,480us-gaap_CommonStockSharesOutstanding	25,206,498us-gaap_CommonStockSharesOutstanding

For an unclassified balance sheet, a valuation allowance for receivables due a company that are expected to be uncollectible.

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