Subsequent Event

3 Months Ended

Mar. 31, 2019

Subsequent Events [Abstract]

Subsequent Event

18. Subsequent Event

Effective April 30, 2019, the Hercules Loan Agreement was amended (the “Hercules Amendment”) to eliminate the availability of the Tranche III Loan facility, add a new Tranche IV Loan facility of up to $20 million, revise certain financial covenants and make other changes.  The availability of advances under the Tranche IV Loan is not milestone-based, rather the Company can request advances in minimum $5 million increments at any time during the period from July 1, 2019 through December 31, 2020, subject to the funding discretion of the Lender. The monthly trailing six month net revenue financial covenant was amended to be tested quarterly and to change the projected net revenue percentage to be met for the six months ending on the last day of each fiscal quarter.  If such quarterly financial covenant is not achieved as of the last day of any fiscal quarter, as tested on the thirtieth day after quarter end, the Company must comply with the waiver conditions in the Hercules Amendment from such test date until the next quarterly test date.  The Hercules Amendment was executed by the parties on May 7, 2019.