Commitments And Contingencies	3 Months Ended
Commitments And Contingencies	Mar. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	12. Commitments and Contingencies Office Lease In 2013, the Company entered into a lease for new corporate office space location in Baltimore, Maryland. The lease provided for three months of rent abatement and includes escalating rent payments. Rent expense is recognized on a straight‑line basis over the term of the lease. Rent expense under the lease amounted to approximately $44,000 for the three months ended March 31, 2018 and 2017. The lease expires on December 31, 2018. The Company's management is currently evaluating other office space for occupancy beyond 2018.