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Income Taxes
 3 Months Ended
Jun. 30, 2012
Income Taxes [Abstract]  
Income Taxes

8. Income Taxes

     For the three months ended June 30, 2012 and 2011, the Company recorded an income tax benefit of $0.8 million and income tax expense of $0.2 million, respectively. The income tax benefit for the three months ended June 30, 2012, was primarily due to a refund of Chinese income taxes of $0.9 million. The Company has provided a valuation allowance against all deferred tax assets as of June 30, 2012, as it is more likely than not that its deferred tax assets are not currently realizable due to the net operating losses incurred by the Company since its inception.