XML 41 R29.htm IDEA: XBRL DOCUMENT
v3.21.1

Term Notes Payable (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2021
Pharmakon Term Notes |
Debt Instrument [Line Items] |
Schedule of future payments under debt agreements | ​
​ | ​ | ​
Years ended December 31, | Principal Payments
2021 | $ | 37,500
2022 | ​ | 50,000
2023 | ​ | 50,000
2024 | ​ | 12,500
Total before unamortized discount and issuance costs | $ | 150,000
Less: unamortized discount and issuance costs | ​ | (4,289)
Total term notes | $ | 145,711

X
- Definition 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. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of maturity and sinking fund requirement for long-term debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
Name: | us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_DebtInstrumentAxis=coll_PharmakonTermNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |