CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Current assets:
Accounts receivable, allowances for bad debts and customer credits	$ 770	$ 405
Stockholders' equity:
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, authorized (in shares)	11,445,187us-gaap_PreferredStockSharesAuthorized	11,445,187us-gaap_PreferredStockSharesAuthorized
Preferred stock, outstanding (in shares)
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, authorized (in shares)	55,000,000us-gaap_CommonStockSharesAuthorized	55,000,000us-gaap_CommonStockSharesAuthorized
Common stock, issued (in shares)	8,880,377us-gaap_CommonStockSharesIssued	8,909,737us-gaap_CommonStockSharesIssued
Common stock, outstanding (in shares)	8,880,377us-gaap_CommonStockSharesOutstanding	8,909,737us-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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