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Subsequent events	3 Months Ended
Subsequent events	Mar. 31, 2013
Subsequent events
Subsequent events	12. Subsequent events On April 1, 2013, the Company approved a stock repurchase program to repurchase up to $10,000 of the Company’s common stock in the open market, exclusive of any commissions, markups or expenses. The stock repurchased will be retired and will resume the status of authorized but unissued shares of common stock.