Notes Payable - Narrative (Details) - USD ($) $ in Millions |
9 Months Ended | ||
---|---|---|---|
Sep. 30, 2018 |
Nov. 30, 2017 |
Apr. 30, 2015 |
|
Notes Payable to Banks | Prime Rate | |||
Debt Instrument [Line Items] | |||
Interest rate at period end | 5.25% | ||
2017 SVB Loan Agreement | Notes Payable to Banks | |||
Debt Instrument [Line Items] | |||
Face amount | $ 10.0 | ||
Repayment period | 30 months | ||
Interest-only period | 18 months | ||
Final payment fee | $ 0.9 | ||
2015 SVB Loan Agreement | |||
Debt Instrument [Line Items] | |||
Interest margin in event of default | 5.00% | ||
2015 SVB Loan Agreement | Notes Payable to Banks | |||
Debt Instrument [Line Items] | |||
Face amount | $ 5.0 | ||
Repayment period | 30 months | ||
Interest-only period | 18 months | ||
Final payment fee percent | 5.50% | ||
Loss on debt extinguishment | $ 0.1 | ||
2015 SVB Loan Agreement | Notes Payable to Banks | Prime Rate | |||
Debt Instrument [Line Items] | |||
Variable rate | (0.25%) |