Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Current assets
Allowance for doubtful accounts receivable, current	$ 52	$ 52
Stockholders equity
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	25,000us-gaap_PreferredStockSharesAuthorized	25,000us-gaap_PreferredStockSharesAuthorized
Preferred stock, shares issued	0us-gaap_PreferredStockSharesIssued	0us-gaap_PreferredStockSharesIssued
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	100,000us-gaap_CommonStockSharesAuthorized	100,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued	46,177us-gaap_CommonStockSharesIssued	44,758us-gaap_CommonStockSharesIssued
Common stock, shares outstanding	46,177us-gaap_CommonStockSharesOutstanding	44,758us-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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