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v3.21.1

Commitments - Additional Information (Details) |  |  |  |  |  |  | 12 Months Ended
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Oct. 01, 2020 USD ($) | Sep. 22, 2020 ft² | Jul. 27, 2020 USD ($) | Jul. 02, 2020 USD ($) | Jul. 01, 2020 USD ($) ft² | Jun. 25, 2020 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($)
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Employment agreement, description | Mr. Michel shall also be entitled to: (a) a severance payment equal in the aggregate to twelve (12) months of his annual base salary at the time of termination, payable in twelve (12) equal monthly installments; and (b) specified continuing health plan benefits until the earlier of (i) the twelve (12) month anniversary of his termination date, (ii) the last day he’s eligible for coverage pursuant to COBRA or (iii) the date on which he becomes eligible for similar coverage from another employer. |  |  |  |  |  |  |
Lease, description |  |  |  |  |  |  | the 2014 Sublease and 2015 Sublease were extended from May 31, 2020 to August 2, 2021, (ii) effective July 1, 2020, the leased premises under the 2015 Sublease would be expanded to include an additional 4,999 square feet of space, and (iii) effective July 1, 2020, the rent under the 2015 Sublease would increase from approximately $14.6 per month to $20.6 per month. |
Extension of sublease |  |  |  |  | May 31, 2020 to August 2, 2021 |  |  |
Lease term |  |  |  |  |  |  | 12 months |
Operating or finance lease |  |  |  |  |  | $ 0 | $ 520,000 |
Sub lease expiration date |  | Feb. 28, 2023 |  |  |  |  |  |
Rent expense, net of receipts under the terms of subleases |  |  |  |  |  |  | 423,000 | $ 529,000
Sublease 2015 [Member] |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Additional area of space | ft² |  |  |  |  | 4,999 |  |  |
Increase in sublease rent |  |  |  | $ 20,600,000 | $ 14,600,000 |  |  |
2021 Sub-Lease Agreement [Member] |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Additional area of space | ft² |  | 6,877 |  |  |  |  |  |
Sublease rent |  |  |  |  |  | $ 3,700 | 405,700 |
Lease term |  |  |  |  |  | 5 years |  |
Office Space at 1301 Avenue of the Americas, New York, NY [Member] |  |  |  |  |  |  |  |
Letter of credit |  |  |  |  |  |  |  |
Minimum letter of credit amount required to be maintained under lease agreement |  |  |  |  |  |  | $ 131,000 |
Expiration date of letter of credit |  |  |  |  |  |  | Feb. 28, 2023 |
Chief Executive Officer [Member] |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Salary and wage, Officer | $ 450,000 |  |  |  |  |  |  |
Annual target cash bonus, (in percent) | 50.00% |  |  |  |  |  |  |
Chief Executive Officer [Member] | Maximum [Member] |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Reimbursement for travel and stay, per month | $ 6,500 |  |  |  |  |  |  |
Pending Litigation [Member] |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Unpaid compensation amounts claimed |  |  | $ 1,140,000 |  |  |  |  |
Accrued unpaid compensation amounts |  |  |  |  |  |  | $ 1,140,000 |

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