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Debt - Credit Agreement (Details) - USD ($) | Jan. 12, 2018 | Jul. 20, 2016 | Dec. 31, 2020 | Dec. 31, 2019 | Jan. 31, 2019 | Dec. 31, 2018 | Nov. 30, 2018 | Dec. 31, 2017
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Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Amount required to remit due to excess cash flow, percentage |  |  |  |  |  |  |  | 50.00%
Bridge Term Loan |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt issued |  |  |  |  |  | $ 10,000,000.0 |  |
Debt instrument, periodic payment | $ 250,000,000 |  |  |  |  |  |  |
Base Rate | Bridge Term Loan |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Basis spread over variable rate | 5.00% |  |  |  |  |  |  |
LIBOR Rate | Bridge Term Loan |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Basis spread over variable rate | 6.00% |  |  |  |  |  |  |
Senior Credit Facility Agreement | Loans Payable |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  | $ 25,000,000.0 |  |  |  |  |  |
Debt issued |  |  |  | $ 22,500,000 | $ 20,000,000.0 | $ 25,000,000.0 |  |
Debt installment payments |  | 900,000 |  |  |  |  |  |
Revolving Credit Facility |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  |  |  |  |  | $ 25,000,000.0 |
Revolving Credit Facility | Senior Credit Facility Agreement |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt issued |  | 24,000,000.0 |  |  |  |  |  |
Line of credit facility, fair value of amount outstanding |  |  | $ 0 | $ 0 |  |  |  |
Senior Credit Facility | Loans Payable |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt installment payments |  | $ 750,000 |  |  |  |  |  |

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- Definition Amount Required To Remit Due to Excess Cash Flow, Percentage + References No definition available. + Details
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- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 + Details
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- Definition Amount of the required periodic payments including both interest and principal payments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823 + Details
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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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