Subsequent Event	9 Months Ended
Sep. 30, 2019
Subsequent Event.
Subsequent Event	Note 13. Subsequent Events Term Loan Credit Agreement On October 30, 2019, the Company entered into a credit and security agreement (the “Term Loan Credit Agreement”) agented by MidCap Financial Trust (“MidCap”) and the collateral agent (together with MidCap, the “Lenders”), pursuant to which the Lenders, including affiliates of MidCap and Silicon Valley Bank, agreed to provide a $50.0 million term loan facility for general corporate purposes. The Term Loan Credit Agreement provides for a $10.0 million term loan funded at the closing date, with the ability to access the remaining funding in two additional tranches (of $20.0 million each), subject to specified availability periods and the satisfaction of certain conditions (collectively, the “Term Loans”). The Term Loan Credit Agreement requires the Company to maintain cash and cash equivalents of at least 35% of the outstanding Term Loans at all times and the Credit Agreement is secured by a perfected security interest in all of the Company's assets except for intellectual property and certain other customary excluded property pursuant to the terms of the Term Loan Credit Agreement. Each Term Loan under the Term Loan Credit Agreement is subject to an origination fee of 0.25% of each funding and bear interest at an annual rate based on prime rate plus 2.91%, subject to a prime rate floor of 4.94%. Commencing November 1, 2019, the Company is required to make interest-only payments on the Term Loans for 24 months. Following the end of the interest-only payments, the Term Loans will begin amortizing on November 1, 2021, with equal monthly payments of principal plus interest being made by the Company to the Lenders for 24 consecutive monthly payments. All unpaid principal and accrued interest is due and payable in full no later than October 1, 2023. At the Company’s option, the Company may prepay the outstanding principal balance of the Term Loans in whole or in part, subject to a prepayment premium of 3.0% of any amount prepaid if the prepayment occurs through and including the first anniversary of the closing date (October 30, 2020), 2.0% of the amount prepaid if the prepayment occurs after the first anniversary of the closing date through and including the second anniversary of the closing date (October 30, 2021), and 1.0% of any amount prepaid after the second anniversary of the closing date and prior to October 1, 2023. An additional 2.85% of the amount of Term Loans advanced by the Lenders will be due upon prepayment or repayment of the Term Loans. Registration Statement on Form S-3 In October 2019, the Company filed a Registration Statement on Form S-3 (File no. 333-234414) (the “Shelf Registration Statement”) covering the offering of up to $250.0 million of common stock, preferred stock, debt securities and warrants. The Company may use the Shelf Registration Statement, when effective, at any time or from time to time to offer, in one or more offerings, common stock, preferred stock, debt securities and warrants.

Note 13. Subsequent Events

Term Loan Credit Agreement

On October 30, 2019, the Company entered into a credit and security agreement (the “Term Loan Credit Agreement”) agented by MidCap Financial Trust (“MidCap”) and the collateral agent (together with MidCap, the “Lenders”), pursuant to which the Lenders, including affiliates of MidCap and Silicon Valley Bank, agreed to provide a $50.0 million term loan facility for general corporate purposes. The Term Loan Credit Agreement provides for a $10.0 million term loan funded at the closing date, with the ability to access the remaining funding in two additional tranches (of $20.0 million each), subject to specified availability periods and the satisfaction of certain conditions (collectively, the “Term Loans”). The Term Loan Credit Agreement requires the Company to maintain cash and cash equivalents of at least 35% of the outstanding Term Loans at all times and the Credit Agreement is secured by a perfected security interest in all of the Company's assets except for intellectual property and certain other customary excluded property pursuant to the terms of the Term Loan Credit Agreement.

Each Term Loan under the Term Loan Credit Agreement is subject to an origination fee of 0.25% of each funding and bear interest at an annual rate based on prime rate plus 2.91%, subject to a prime rate floor of 4.94%. Commencing November 1, 2019, the Company is required to make interest-only payments on the Term Loans for 24 months. Following the end of the interest-only payments, the Term Loans will begin amortizing on November 1, 2021, with equal monthly payments of principal plus interest being made by the Company to the Lenders for 24 consecutive monthly payments. All unpaid principal and accrued interest is due and payable in full no later than October 1, 2023. At the Company’s option, the Company may prepay the outstanding principal balance of the Term Loans in whole or in part, subject to a prepayment premium of 3.0% of any amount prepaid if the prepayment occurs through and including the first anniversary of the closing date (October 30, 2020), 2.0% of the amount prepaid if the prepayment occurs after the first anniversary of the closing date through and including the second anniversary of the closing date (October 30, 2021), and 1.0% of any amount prepaid after the second anniversary of the closing date and prior to October 1, 2023. An additional 2.85% of the amount of Term Loans advanced by the Lenders will be due upon prepayment or repayment of the Term Loans.

Registration Statement on Form S-3

In October 2019, the Company filed a Registration Statement on Form S-3 (File no. 333-234414) (the “Shelf Registration Statement”) covering the offering of up to $250.0 million of common stock, preferred stock, debt securities and warrants. The Company may use the Shelf Registration Statement, when effective, at any time or from time to time to offer, in one or more offerings, common stock, preferred stock, debt securities and warrants.