Income Taxes	6 Months Ended
Jun. 30, 2018
Income Tax Disclosure [Abstract]
Income taxes	Income Taxes On December 22, 2017, the U.S. government enacted comprehensive tax legislation commonly referred to as the Tax Cuts and Jobs Act (the “Tax Act”), which has several key provisions impacting accounting for and reporting of income taxes. The most significant provisions applicable to the Company include the reduction of the U.S. corporate statutory tax rate from 35% to 21%, the limitations on net operating losses (“NOLs”) generated after December 31, 2017 to 80% of taxable income, and the indefinite carryforward period applicable to NOLs generated after December 31, 2017. The Company recorded an income tax benefit of $35 thousand for the three months ended June 30, 2018 and an income tax expense of $0.2 million for the three months ended June 30, 2017. The Company recorded an income tax benefit of $0.1 million for the six months ended June 30, 2018 and an income tax expense of $0.3 million for the six months ended June 30, 2017. As of December 31, 2017, the Company had obtained and analyzed all necessary information to record the effect of the change in tax law, and does not anticipate reporting additional tax effects in the future. However, should the Internal Revenue Service (“IRS”) issue further guidance or interpretation of relevant aspects of the new Tax Act, the Company may adjust these amounts. There were no material changes to the Company’s unrecognized tax benefits in the six months ended June 30, 2018, and the Company does not expect to have any significant changes to unrecognized tax benefits through the end of the fiscal year. Due to the presence of NOL carryforwards, all income tax years remain open for examination by the IRS and various state taxing authorities.

Income Taxes

On December 22, 2017, the U.S. government enacted comprehensive tax legislation commonly referred to as the Tax Cuts and Jobs Act (the “Tax Act”), which has several key provisions impacting accounting for and reporting of income taxes. The most significant provisions applicable to the Company include the reduction of the U.S. corporate statutory tax rate from 35% to 21%, the limitations on net operating losses (“NOLs”) generated after December 31, 2017 to 80% of taxable income, and the indefinite carryforward period applicable to NOLs generated after December 31, 2017. The Company recorded an income tax benefit of $35 thousand for the three months ended June 30, 2018 and an income tax expense of $0.2 million for the three months ended June 30, 2017. The Company recorded an income tax benefit of $0.1 million for the six months ended June 30, 2018 and an income tax expense of $0.3 million for the six months ended June 30, 2017.

As of December 31, 2017, the Company had obtained and analyzed all necessary information to record the effect of the change in tax law, and does not anticipate reporting additional tax effects in the future. However, should the Internal Revenue Service (“IRS”) issue further guidance or interpretation of relevant aspects of the new Tax Act, the Company may adjust these amounts.

There were no material changes to the Company’s unrecognized tax benefits in the six months ended June 30, 2018, and the Company does not expect to have any significant changes to unrecognized tax benefits through the end of the fiscal year. Due to the presence of NOL carryforwards, all income tax years remain open for examination by the IRS and various state taxing authorities.