Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Allowance for doubtful accounts	$ 254	$ 148
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	90,000,000us-gaap_CommonStockSharesAuthorized	90,000,000us-gaap_CommonStockSharesAuthorized
Common Stock, Shares, Issued	26,247,000us-gaap_CommonStockSharesIssued	25,247,000us-gaap_CommonStockSharesIssued
Common stock, shares outstanding	25,588,000us-gaap_CommonStockSharesOutstanding	24,785,000us-gaap_CommonStockSharesOutstanding
Treasury stock, shares	659,000us-gaap_TreasuryStockShares	462,000us-gaap_TreasuryStockShares
Redeemable Preferred Stock, Series A-1 [Member]
Redeemable preferred stock, par value	$ 0.001	$ 0.001
Redeemable preferred stock, shares authorized	0	0
Redeemable preferred stock, shares issued	0	0
Redeemable preferred stock, shares outstanding	0	0
Series A-2 Preferred Stock [Member]
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	0	0
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Preferred Stock [Member]
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0

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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