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Convertible Senior Notes (Tables)
9 Months Ended
Sep. 30, 2020
Convertible Senior Notes  
Schedule of components of notes payable

Notes payable consisted of the following at September 30, 2020:

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​

​

​

​

​

​

September 30, 2020

Principal amount of Notes

​

$

115,000,000

Unamortized debt issuance costs

​

 

(3,844,791)

Net carrying value of Notes payable

​

$

111,155,209

Schedule of interest expenses incurred in connection with the Notes

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​

​

​

​

​

​

​

​

    

Three Months Ended

    

Nine Months Ended

​

​

September 30, 2020

​

September 30, 2020

Coupon interest

​

$

891,250

​

$

1,226,667

Amortization of debt issuance costs

​

​

187,499

​

 

247,604

Total interest expense on Notes

​

$

1,078,749

​

$

1,474,271

Schedule of total gross principal payments due under the Company's notes payable

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​

​

​

​

Years Ending December 31, 

    

    

​

Remainder of 2020

​

$

—

2021

​

 

—

2022

​

 

—

2023

​

 

—

2024

​

 

—

2025

​

 

115,000,000

Total Payments

​

$

115,000,000