XML 135 R94.htm IDEA: XBRL DOCUMENT
v3.3.1.900

Convertible Preferred Stock (Details) - USD ($) | 1 Months Ended | 2 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
May. 31, 2015 | Mar. 31, 2015 | Feb. 28, 2015 | Sep. 30, 2015 | Sep. 30, 2014 | Dec. 31, 2014 | Dec. 31, 2013
Preferred stock |  |  |  |  |  |  |
Principal amount converted |  |  |  | $ 5,000,000 |  |  |
Accruals of dividends and accretion to redemption value |  |  |  | 24,572,000 | $ 2,469,000 | $ 3,300,000 | $ 2,926,000
Gain on extinguishment for amendment to dividend terms |  |  |  | 31,806,000 |  |  |
6.0% Convertible promissory notes |  |  |  |  |  |  |
Preferred stock |  |  |  |  |  |  |
Principal amount converted |  | $ 5,000,000 |  |  |  |  |
Series D convertible redeemable preferred stock |  |  |  |  |  |  |
Preferred stock |  |  |  |  |  |  |
Issuance of stock (in shares) |  | 41,666,667 |  |  |  |  |
Aggregate consideration |  | $ 50,000,000 |  |  |  |  |
Cash consideration from issuance of preferred stock |  | 45,000,000 |  |  |  |  |
Accruals of dividends and accretion to redemption value |  |  |  | $ 24,572,000 |  |  |
Series A convertible redeemable preferred stock |  |  |  |  |  |  |
Preferred stock |  |  |  |  |  |  |
Dividend rate (as a percent) |  |  | 4.50% |  |  | 4.50% |
Accruals of dividends and accretion to redemption value |  |  |  |  |  | $ 504,000 | 970,000
Series B convertible redeemable preferred stock |  |  |  |  |  |  |
Preferred stock |  |  |  |  |  |  |
Dividend rate (as a percent) |  |  | 8.00% |  |  | 8.00% |
Accruals of dividends and accretion to redemption value |  |  |  |  |  | $ 1,836,000 | 1,836,000
Series C convertible redeemable preferred stock |  |  |  |  |  |  |
Preferred stock |  |  |  |  |  |  |
Dividend rate (as a percent) |  |  | 8.00% |  |  | 8.00% |
Accruals of dividends and accretion to redemption value |  |  |  |  |  | $ 960,000 | $ 120,000
Series A, Series B and Series C convertible redeemable preferred stock |  |  |  |  |  |  |
Preferred stock |  |  |  |  |  |  |
Accrued dividends |  |  | $ 622,000 |  |  |  |
Gain on extinguishment for amendment to dividend terms |  | 31,806,000 |  |  |  |  |
Series A, Series B and Series C convertible redeemable preferred stock | Mandatory conversion, initial public offering | Minimum |  |  |  |  |  |  |
Preferred stock |  |  |  |  |  |  |
Gross proceeds from sale of stock |  | $ 50,000,000 |  |  |  |  |
Redeemable Convertible Preferred Stock | Conversion of redeemable convertible preferred stock into common stock |  |  |  |  |  |  |
Preferred stock |  |  |  |  |  |  |
Number of shares of common stock into which convertible preferred stock was converted | 12,591,456 |  |  |  |  |  |
Redeemable Convertible Preferred Stock | Mandatory conversion, initial public offering | Minimum |  |  |  |  |  |  |
Preferred stock |  |  |  |  |  |  |
Gross proceeds from sale of stock |  |  |  |  |  | $ 50,000,000 |

X
- Definition Represents the combined value of accretion of temporary equity during the period due to unpaid dividends and accretion of temporary equity to its redemption value during the period. + References No definition available. + Details
Name: | coll_TemporaryEquityAccretionOfDividendsAndAccretionToRedemptionValue
Namespace Prefix: | coll_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of gain (loss) due to an amendment to the dividend terms of temporary equity which is accounted for as an extinguishment. + References No definition available. + Details
Name: | coll_TemporaryEquityGainLossOnExtinguishment
Namespace Prefix: | coll_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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_ClassOfStockLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of new shares issued in the conversion of stock in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
Name: | us-gaap_ConversionOfStockSharesIssued1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 + Details
Name: | us-gaap_DebtConversionOriginalDebtAmount1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The percentage rate used to calculate dividend payments on preferred stock. + References No definition available. + Details
Name: | us-gaap_PreferredStockDividendRatePercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The cash inflow from the additional capital contribution to the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3255-108585 + Details
Name: | us-gaap_ProceedsFromIssuanceOfCommonStock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The cash inflow from issuance of callable preferred stock which is identified as being convertible to another type of financial security at the option of the issuer or the holder. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3255-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
Name: | us-gaap_ProceedsFromIssuanceOfRedeemableConvertiblePreferredStock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Number of new stock issued during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
Name: | us-gaap_StockIssuedDuringPeriodSharesNewIssues
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30, 31 -Article 5 + Details
Name: | us-gaap_StockIssuedDuringPeriodValueNewIssues
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Value of accretion of temporary equity during the period due to unpaid dividends. + References No definition available. + Details
Name: | us-gaap_TemporaryEquityAccretionOfDividends
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_DebtConversionByUniqueDescriptionAxis=coll_ConvertiblePromissoryNotes6.0PercentDueNovember2015Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_SeriesDPreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_SeriesAPreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_SeriesBPreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_SeriesCPreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=coll_SeriesSeriesBAndSeriesCRedeemableConvertiblePreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementScenarioAxis=coll_ConvertibleFinancialInstrumentMandatoryConversionCompletionOfInitialPublicOfferingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_RedeemableConvertiblePreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConversionOfStockByUniqueDescriptionAxis=coll_ConversionOfStockRedeemableConvertiblePreferredStockIntoCommonStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |