Total fair value of warrants issued during the period.

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- Definition

Represents the borrowing option amount as a percentage of eligible accounts receivable, less certain reserves.

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No definition available.

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- Definition

The amount of additional commitment fee payable on first and second anniversaries of the closing date, or upon earlier termination of, or default under the agreement.

+ References

No definition available.

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The amount of debt termination charges required to pay if loan terminated before maturity date.

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No definition available.

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Exercise price per share or per unit of warrants or rights outstanding.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

+ References

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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No definition available.

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Face (par) amount of debt instrument at time of issuance.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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Represents the charge against earnings during the period for commitment fees and debt issuance expenses.

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Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

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Debt (Details) - USD ($)			1 Months Ended			12 Months Ended
Debt (Details) - USD ($)	Nov. 15, 2018	May 31, 2018	Aug. 31, 2019	May 31, 2018	Oct. 31, 2016	Dec. 31, 2020	Dec. 31, 2018
Debt Instrument
Loss on early extinguishment of debt						$ 13,374,000	$ 12,993,000
Outstanding borrowings						236,288,000
Outstanding warrants to purchase common stock
Debt Instrument
Total fair value of warrants				$ 1,400,000
CRG Loan
Debt Instrument
Proceeds from issuance of debt		$ 45,000,000.0			$ 80,000,000.0
Loss on early extinguishment of debt	$ 13,000,000.0
CRG Loan \| Outstanding warrants to purchase common stock
Debt Instrument
Warrant exercise price (in USD per share)		$ 23.00		$ 23.00
CRG Loan \| Outstanding warrants to purchase common stock \| Maximum
Debt Instrument
Shares of common stock right to purchase by warrant (in shares)		200,000		200,000
Line of Credit Agreement
Debt Instrument
Maximum borrowing capacity			$ 50,000,000.0			50,000,000.0
Basis for variable rate			5.50%
Debt termination fee			$ 1,000,000.0
Payment of initial commitment fee			150,000
Additional commitment fees payable each of the first and second anniversaries of the closing date			$ 150,000
Outstanding borrowings						$ 0
Line of Credit Agreement \| Maximum
Debt Instrument
Borrowing option - percentage of eligible accounts receivable			85.00%			85.00%
Convertible Debt \| Convertible Notes
Debt Instrument
Convertible Notes initially issued	$ 210,000,000.0