Research Grants And Agreements	3 Months Ended
Research Grants And Agreements	Mar. 31, 2017
Research Grants And Agreements [Abstract]
Research Grants And Agreements	8. Research Grants and Agreements Sponsored Research Agreement The Company entered into a Sponsored Research Agreement (“SRA”) with the Old Dominion University Research Foundation (“ODURF”) during 2014 pursuant to which the Company sponsors research activities performed by ODURF’s Frank Reidy Center. ODURF is compensated by the Company for its conduct of each study in accordance with the budget and payment terms set forth in the applicable task order. During the second quarter of 2016, the Company agreed to sponsor $1.0 million in research during the subsequent 12-month period to be funded through monthly payments made upon ODURF certifying, to the Company’s reasonable satisfaction, that ODURF has met its obligations pursuant to the specified task order and statement of work. The principal investigator may transfer funds with the budget as needed without the Company’s approval so long as the obligations of ODURF under the task order and statement of work remain unchanged and unimpaired. As of March 31, 2017, the Company had no remaining research payments due to ODURF. During the three-month periods ended March 31, 2017 and 2016, the Company paid and incurred costs relating to the SRA equal to $250,000 and $164,000, respectively.

The entire disclosure for research, development, and computer software activities, including contracts and arrangements to be performed for others and with federal government. Includes costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility and in-process research and development acquired in a business combination consummated during the period.