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Subsequent Events - Additional Information (Details) - USD ($) |  |  |  |  |  | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jun. 11, 2020 | Jun. 05, 2020 | May 08, 2020 | Apr. 24, 2020 | Apr. 20, 2020 | Apr. 30, 2020 | Jun. 08, 2020 | May 11, 2020 | May 10, 2020 | Oct. 31, 2019
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |
Common stock, shares authorized |  |  |  |  |  | 225,000,000 |  |  |  | 225,000,000
Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |
Increase in the number of authorized shares |  |  | 112,500,000 |  |  |  |  |  |  |
Common stock, shares authorized |  |  |  |  |  |  |  | 337,500,000 | 225,000,000 |
Subsequent Event [Member] | At Market Issuance Sales Agreement [Member] | B. Riley FBR, Inc [Member] |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |
Sales agreement termination date |  | Jun. 12, 2020 |  |  |  |  |  |  |  |
Subsequent Event [Member] | 2018 Omnibus Incentive Plan [Member] | Non-Employee Director [Member] |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |
Number of Shares Authorized |  |  | 4,333,333 |  |  |  |  |  |  |
Common stock reserved for settlement of restricted stock units |  |  | 1,000,000 |  |  |  |  |  |  |
Minimum [Member] | Subsequent Event [Member] | 2018 Omnibus Incentive Plan [Member] | Non-Employee Director [Member] |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |
Grant-date fair value of awards |  |  | $ 200,000,000 |  |  |  |  |  |  |
Maximum [Member] | Subsequent Event [Member] | 2018 Omnibus Incentive Plan [Member] |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |
Number of additional shares authorized |  |  | 4,000,000 |  |  |  |  |  |  |
Maximum [Member] | Subsequent Event [Member] | 2018 Omnibus Incentive Plan [Member] | Non-Employee Director [Member] |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |
Grant-date fair value of awards |  |  | $ 250,000,000 |  |  |  |  |  |  |
Liberty Bank Promissory Note (PPP Note) [Member] |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |
Long-term line of credit |  |  |  |  |  | $ 6,515,000 |  |  |  |
Liberty Bank Promissory Note (PPP Note) [Member] | Liberty Bank [Member] |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |
Loan forgiveness terms |  |  |  |  |  | In order to obtain the consent of the Agent and the Orion Lenders under the Orion Facility to enter into the PPP Note, the Agent and the Orion Lenders have required the Company to apply for forgiveness within 30 days after the last day of the loan forgiveness period as designated under the PPP regulations in effect as of June 6, 2020. |  |  |  |
Liberty Bank Promissory Note (PPP Note) [Member] | Liberty Bank [Member] | CARES Act [Member] |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |
Proceeds from long-term lines of credit |  |  |  | $ 6,500,000 |  |  |  |  |  |
Loan forgiveness terms |  |  |  |  |  | In order to obtain the consent of the Agent and the Orion Lenders under the Orion Facility to enter into the PPP Note, the Agent and the Orion Lenders have required the Company to apply for forgiveness within 30 days after the last day of the loan forgiveness period as designated under the PPP regulations in effect as of June 6, 2020. If we seek forgiveness of the loan, we must apply for such forgiveness by October 31, 2020. |  |  |  |
Loan forgiveness period |  |  |  | 56 days | 56 days |  |  |  |  |
Debt instrument term |  |  |  | 2 years | 2 years |  |  |  |  |
Liberty Bank Promissory Note (PPP Note) [Member] | Liberty Bank [Member] | PPP Flexibility Act [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |
Loan forgiveness period |  | 168 days |  |  |  |  |  |  |  |
Debt instrument term |  | 5 years |  |  |  |  |  |  |  |
Liberty Bank Promissory Note (PPP Note) [Member] | Minimum [Member] | Liberty Bank [Member] | CARES Act [Member] |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |
Percentage of proceeds used for payroll expenditure |  |  |  | 75.00% | 75.00% | 75.00% |  |  |  |
Liberty Bank Promissory Note (PPP Note) [Member] | Minimum [Member] | Liberty Bank [Member] | PPP Flexibility Act [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |
Percentage of proceeds used for payroll expenditure |  | 60.00% |  |  |  |  |  |  |  |
Orion Credit Agreement [Member] | Senior Secured Credit Facility [Member] |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |
Long-term line of credit |  |  |  |  |  |  |  |  |  | $ 200,000,000.0
Orion Credit Agreement [Member] | Fifth Orion Amendment [Member] |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |
Line of credit facility, description |  |  |  |  |  | The Secondary Facility Loan commitment allows the Company to draw on the Secondary Facility Loans commencing on June 5, 2020 (the “Commencement Date”) and terminating on September 14, 2020 (the “Termination Date”). The Company may make draws on the Secondary Facility Loans in amounts of no less than $5 million, and no more than $15 million may be drawn in any 30 day period, provided that the Company may draw any remaining available funds under the Secondary Facility Loans between August 15, 2020 and the Termination Date. Any drawn amounts must be fully repaid on or before September 1, 2021 (the “Secondary Facility Repayment Date”). |  |  |  |
Orion Credit Agreement [Member] | Subsequent Event [Member] | Fifth Orion Amendment [Member] |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity | $ 35,000,000 |  |  |  |  |  | $ 35,000,000 |  |  |
Line of credit facility, commencement date | Jun. 05, 2020 |  |  |  |  |  |  |  |  |
Line of credit facility, repayment date | Sep. 01, 2021 |  |  |  |  |  |  |  |  |
Agreed to pay option premium in exchange for loan commitment | $ 1,000,000 |  |  |  |  |  |  |  |  |
Percentage of discount for each draw | 5.00% |  |  |  |  |  |  |  |  |
Percentage of discount for each draw if not paid with in six months | 10.00% |  |  |  |  |  |  |  |  |
Percentage of discount for each draw if not paid with in nine months | 20.00% |  |  |  |  |  |  |  |  |
Percentage of cash interest paid | 9.90% |  |  |  |  |  |  |  |  |
Line of credit facility, frequency of payments | quarterly |  |  |  |  |  |  |  |  |
Percentage of payment-in-kind interest | 2.05% |  |  |  |  |  |  |  |  |
Percentage of prepayment of credit facility upon issuance of debt | 100.00% |  |  |  |  |  |  |  |  |
Percentage of prepayment of credit facility upon issuance of equity | 50.00% |  |  |  |  |  |  |  |  |
Orion Credit Agreement [Member] | Minimum [Member] | Subsequent Event [Member] | Fifth Orion Amendment [Member] |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |
Amount may draws on the secondary facility loan | $ 5,000,000 |  |  |  |  |  |  |  |  |
Orion Credit Agreement [Member] | Maximum [Member] | Subsequent Event [Member] | Fifth Orion Amendment [Member] |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |
Amount may draws on the secondary facility loan | $ 15,000,000 |  |  |  |  |  |  |  |  |

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