Commitments	3 Months Ended
Mar. 31, 2017
Commitments And Contingencies Disclosure [Abstract]
Commitments	Note 8 - Commitments Operating leases The Company leases a facility in Woburn, Massachusetts under an operating lease that expires January 30, 2022. The Company also leases a facility in Gaithersburg, Maryland under an operating lease that expires January 31, 2021, with one additional five-year renewal at the Company’s election. Additionally, the Company leases office space in Denmark; this lease is currently on a month-to-month basis. Rent expense under the Company’s facility operating leases for the three months ended March 31, 2017 and 2016 was $232,836 and $254,044, respectively. Capital leases The Company leases computer equipment, office furniture, and equipment under various capital leases. The leases expire at various dates through 2021. The leases require monthly principal and interest payments. Registration and other stockholder rights In connection with the various investment transactions, the Company entered into registration rights agreements with stockholders, pursuant to which the investors were granted certain demand registration rights and/or piggyback and/or resale registration rights in connection with subsequent registered offerings of the Company’s common stock.

Commitments

3 Months Ended

Mar. 31, 2017

Commitments And Contingencies Disclosure [Abstract]

Note 8 - Commitments

Operating leases

The Company leases a facility in Woburn, Massachusetts under an operating lease that expires January 30, 2022. The Company also leases a facility in Gaithersburg, Maryland under an operating lease that expires January 31, 2021, with one additional five-year renewal at the Company’s election. Additionally, the Company leases office space in Denmark; this lease is currently on a month-to-month basis.

Rent expense under the Company’s facility operating leases for the three months ended March 31, 2017 and 2016 was $232,836 and $254,044, respectively.

Capital leases

The Company leases computer equipment, office furniture, and equipment under various capital leases. The leases expire at various dates through 2021. The leases require monthly principal and interest payments.

Registration and other stockholder rights

In connection with the various investment transactions, the Company entered into registration rights agreements with stockholders, pursuant to which the investors were granted certain demand registration rights and/or piggyback and/or resale registration rights in connection with subsequent registered offerings of the Company’s common stock.