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Termination Costs - Additional Information (Details) - USD ($) |  |  |  | 9 Months Ended
--- | --- | --- | --- | ---
Jun. 30, 2018 | May 02, 2018 | Apr. 02, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Restructuring Cost And Reserve [Line Items] |  |  |  |  |
Stock compensation expense |  |  |  | $ 1,605,000 | $ 2,536,000
Mr. Charles Myers |  |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |  |
Unvested options shares |  | 283,000 |  |  |
Number of monthly premiums for disability insurance |  | 12 months |  |  |
Remaining amount payable |  |  |  | $ 0 |
Mr. Charles Myers | One Time Benefit |  |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |  |
Severance amount paid in cash |  | $ 484,000 |  |  |
Mr. Charles Myers | Other Employment Benefits |  |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |  |
Severance amount paid in cash |  | 20,000 |  |  |
Mr. Charles Myers | Disability Insurance Plan |  |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |  |
Severance amount paid in cash |  | $ 3,200 |  |  |
Mr. Selbo |  |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |  |
Severance amount paid in cash |  |  | $ 150,000 |  |
Sales and Marketing Expense |  |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |  |
Agreement termination costs | $ 1,300,000 |  |  |  |
General and Administrative Expense | Mr. Charles Myers |  |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |  |
Stock compensation expense |  |  |  |  | $ 1,200,000

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- Definition Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Includes, but is not limited to, one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, and termination benefits associated with an ongoing benefit arrangement. Excludes expenses associated with special or contractual termination benefits, a discontinued operation or an asset retirement obligation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 5.P.3) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140864-122747 + Details
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