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v3.20.2

Borrowings - MidCap Credit Facility - Additional Information (Detail) |  | 1 Months Ended | 3 Months Ended | 6 Months Ended
--- | --- | --- | --- | ---
Aug. 06, 2019 USD ($) Installment $ / shares shares | Dec. 31, 2019 USD ($) | Aug. 31, 2019 USD ($) $ / shares | Jun. 30, 2020 USD ($) | Jun. 30, 2020 USD ($)
Tranche One Warrants |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Warrants to purchase of common stock | shares | 1,171,614 |  |  |  |
Exercise price of warrants | $ / shares | $ 1.11 |  |  |  |
MidCap Credit Facility |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Principal amount | $ 75,000,000.0 |  | $ 65,000,000.0 |  |
Advance of borrowing |  | $ 25,000,000.0 |  |  |
Amount available under credit facility |  |  | 25,000,000.0 |  |
Commitment asset |  |  | 1,500,000 |  |
Other asset |  |  | $ 400,000 |  |
Credit facility, origination fee | 400,000 |  |  |  |
Minimum cash covenant | $ 15,000,000.0 |  |  |  |
Interest on loans increased, percentage | 2.00% |  |  |  |
Term loan advance percentage of amount drawdown | 3.25% |  |  |  |
Exercise price of warrants | $ / shares |  |  | $ 1.11 |  |
MidCap Credit Facility | Between First Anniversary and Prior to Second Anniversary of Closing Date |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Early termination fees, percentage | 2.00% |  |  |  |
MidCap Credit Facility | Prior to First Anniversary of Closing Date |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Early termination fees, percentage | 3.00% |  |  |  |
MidCap Credit Facility | After Second Anniversary and Prior to Third Anniversary of Closing Date |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Early termination fees, percentage | 1.00% |  |  |  |
MidCap Credit Facility | LIBOR |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Interest rate floor |  |  |  |  | 2.00%
MidCap Credit Facility | Minimum |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument Exit Fee Percentage |  | 6.00% |  |  |
MidCap Credit Facility | Maximum |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument Exit Fee Percentage |  | 7.00% |  |  |
MidCap Credit Facility | Commitment Asset |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Asset impairment |  |  |  | $ 400,000 | $ 1,900,000
Tranche 1 | MidCap Credit Facility |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Advance of borrowing | $ 40,000,000.0 |  |  |  |
Debt payable number of equal monthly installments | Installment | 36 |  |  |  |
Debt instrument payment term description | principal on any term loan advance under Tranche 3 is payable beginning on the later of (i) September 1, 2021, and (ii) the first day of the first full calendar month immediately following such term loan advance, in an amount equal to the outstanding term loan advance in respect of Tranche 3 divided by the number of full calendar months remaining before August 1, 2024. |  |  |  |
Tranche 1 | MidCap Credit Facility | LIBOR |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Interest rate (LIBOR) | 6.75% |  |  |  |
Interest rate floor | 2.00% |  |  |  |
Tranche 2 | MidCap Credit Facility |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Amount available under credit facility |  |  | $ 10,000,000.0 |  |
Debt instrument, minimum target net revenue | $ 30,000,000.0 |  | 30,000,000.0 |  |
Minimum cash covenant |  |  |  | 15,000,000.0 | 15,000,000.0
Tranche 3 | MidCap Credit Facility |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Amount available under credit facility |  |  | $ 25,000,000.0 |  |
Debt instrument payment term description | principal on any term loan advance under Tranche 3 is payable beginning on the later of (i) September 1, 2021, and (ii) the first day of the first full calendar month immediately following such term loan advance, in an amount equal to the outstanding term loan advance in respect of Tranche 3 divided by the number of full calendar months remaining before August 1, 2024. |  |  |  |
Minimum cash covenant | $ 20,000,000.0 |  |  | $ 20,000,000.0 | $ 20,000,000.0
Tranche 3 | MidCap Credit Facility | LIBOR |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Interest rate (LIBOR) | 6.75% |  |  |  |
Interest rate floor | 2.00% |  |  |  |

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