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Revenue
3 Months Ended
Mar. 31, 2018
Revenue Recognition [Abstract]  
Revenue
3. Revenue

 

Revenue recognized in the three months ended March 31, 2018 was $nil and contract liability as of December 31, 2017 and March 31, 2018 was $150,000 and is included in Accrued and other current liabilities on the accompanying balance sheets.

 

The aggregate transaction price that is allocated to performance obligations that are unsatisfied (or partially unsatisfied) as of March 31, 2018 was $nil.