XML 66 R55.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Stockholders' Equity - Stock and Warrant Issuances - Additional Information (Details) |  |  | 1 Months Ended | 2 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Oct. 10, 2017 shares | Apr. 02, 2017 USD ($) | Nov. 30, 2017 USD ($) Investor shares | Oct. 31, 2016 USD ($) shares | Jun. 30, 2016 USD ($) shares | Jul. 31, 2015 USD ($) shares | Feb. 28, 2015 USD ($) shares | Oct. 31, 2013 USD ($) shares | Dec. 31, 2017 Investor $ / shares shares | Dec. 31, 2017 USD ($) $ / shares shares | Dec. 31, 2016 USD ($) $ / shares shares | Dec. 31, 2015 USD ($) $ / shares shares | Jun. 06, 2016 USD ($) shares | Oct. 20, 2015 USD ($) | Dec. 31, 2014 $ / shares shares
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of common stock, net of expenses (in shares) |  |  |  | 1,215 |  | 1,670 | 440 | 234 |  |  |  |  |  |  |
Proceeds from issuance of private placement | $ |  |  |  | $ 1,200,000 |  |  | $ 2,600,000 | $ 7,500,000 |  |  |  |  |  |  |
Net proceeds from issuance of private placement | $ |  |  |  | $ 1,100,000 |  |  | $ 2,500,000 | $ 6,900,000 |  |  |  |  |  |  |
Number of warrants outstanding (in shares) |  |  |  |  |  |  |  |  | 7,005,952 | 7,005,952 | 20,616 | 3,224 |  |  | 152
Sale of units to underwriter |  |  |  |  |  | 1,670 |  |  |  |  |  |  |  |  |
Proceeds of common stock issued, net of related expenses | $ |  |  |  |  |  | $ 6,000,000 |  |  |  |  |  |  |  |  |
Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants exercisable per share price (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  | $ 39,424 | $ 39,424 | $ 39,424 | $ 39,424 |  |  | $ 39,424
Maximum offering and selling of stock and securities that entity make to raise capital | $ |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 71,800,000 |
Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants exercisable per share price (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  | $ 2.45 | 2.45 | $ 563.50 | $ 4,144 |  |  | $ 9,800
Amendment to Restructuring Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants issued to purchase Common Stock | 127,551 |  |  |  |  |  |  |  | 127,551 |  |  |  |  |  |
Warrants exercisable per share price (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  | $ 122.50 | $ 122.50 |  |  |  |  |
Number of warrants outstanding (in shares) |  |  |  |  |  |  |  |  | 5,000 | 5,000 |  |  |  |  |
Term period for warrants |  |  |  |  |  |  |  |  | 4 years 6 months |  |  |  |  |  |
Warrants exercised (in shares) |  |  |  |  |  |  |  |  | 122,551 |  |  |  |  |  |
Number of investors | Investor |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |
Warrants exercise price description |  |  |  |  |  |  |  |  |  | The warrants contain a cashless exercise provision that allows the holders to exercise each warrant for three shares of common stock. |  |  |  |  |
Shares issuable upon warrants exercised |  |  |  |  |  |  |  |  | 367,653 | 367,653 |  |  |  |  |
Securities Purchase Agreement [Member] | Warrant Repurchase Agreements [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate amount to be paid in exchange for cancellation of warrants | $ |  | $ 7,900,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Common Shares [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of common stock, net of expenses (in shares) |  |  |  |  |  |  |  |  |  |  | 1,223 | 2,109 |  |  |
Common shares and rights issued |  |  |  |  |  |  |  |  |  | 113,643,624 | 5,158 |  |  |  |
Senior Secured Convertible Notes [Member] | Securities Purchase Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, principal face amount | $ |  |  |  |  |  |  |  |  |  |  |  |  | $ 35,000,000 |  |
Senior Secured Convertible Notes [Member] | Rights [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common shares and rights issued |  |  |  |  |  |  |  |  |  | 108,900,000 |  |  |  |  |
Senior Secured Convertible Notes [Member] | Common Shares [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common shares and rights issued |  |  |  |  |  |  |  |  |  | 112,200,000 |  |  |  |  |
Series A Common Stock Warrants [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants exercisable per share price (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  | $ 49.00 | $ 49.00 |  |  |  |  |
Number of warrants outstanding (in shares) |  |  |  |  |  |  |  |  | 541,000,000 | 541,000,000 |  |  |  |  |
Warrants exercised (in shares) |  |  |  |  |  |  |  |  |  | 300 | 700 |  |  |  |
Net proceeds from exercise of warrants | $ |  |  |  |  |  |  |  |  |  | $ 15,000 | $ 400,000 |  |  |  |
Number of warrants converted |  |  |  |  |  | 1,253 |  |  |  |  | 399 |  |  |  |
Gross proceeds from underwriting offering | $ |  |  |  |  |  | $ 7,000,000 |  |  |  |  |  |  |  |  |
Warrants expiry period |  |  |  |  |  |  |  |  |  | 5 years |  |  |  |  |
Series B Common Stock Warrants [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants exercised (in shares) |  |  |  |  |  |  |  |  |  |  | 399 |  |  |  |
Net proceeds from exercise of warrants | $ |  |  |  |  |  |  |  |  |  |  | $ 800,000 |  |  |  |
Number of warrants converted |  |  |  |  |  | 1,670,000,000 |  |  |  |  |  |  |  |  |
Remaining outstanding warrants expired |  |  |  |  |  |  |  |  |  |  | 1,271 |  |  |  |
Warrants expiration date |  |  |  |  |  |  |  |  |  | Jan. 29, 2016 |  |  |  |  |
Series A and B Common Stock Warrants [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Value of warrants issued | $ |  |  |  |  |  | $ 3,400,000 |  |  |  |  |  |  |  |  |
2013 Warrants [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants issued to purchase Common Stock |  |  |  |  |  |  |  | 106 |  |  |  |  |  |  |
Value of warrants issued | $ |  |  |  |  |  |  |  | $ 1,900,000 |  |  |  |  |  |  |
Warrants exercisable per share price (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  | $ 39,424 | $ 39,424 |  |  |  |  |
Number of warrants outstanding (in shares) |  |  |  |  |  |  |  |  | 106 | 106 |  |  |  |  |
Term period for warrants |  |  |  |  |  |  |  |  |  | 5 years |  |  |  |  |
February 2015 Warrants [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants issued to purchase Common Stock |  |  |  |  |  |  | 197 |  |  |  |  |  |  |  |
Value of warrants issued | $ |  |  |  |  |  |  | $ 800,000 |  |  |  |  |  |  |  |
Warrants exercisable per share price (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  | $ 49.00 | $ 49.00 |  |  |  |  |
Number of warrants outstanding (in shares) |  |  |  |  |  |  |  |  | 92 | 92 |  |  |  |  |
Term period for warrants |  |  |  |  |  |  |  |  |  | 5 years |  |  |  |  |
Warrants exercised (in shares) |  |  |  |  |  |  |  |  |  |  | 114 |  |  |  |
Net proceeds from exercise of warrants | $ |  |  |  |  |  |  |  |  |  |  | $ 100,000 |  |  |  |
Series C Warrants [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Value of warrants issued | $ |  |  |  |  | $ 27,800,000 |  |  |  |  |  |  |  |  |  |
Aggregate amount to be paid in exchange for cancellation of warrants | $ |  |  |  |  |  |  |  |  |  | $ 7,876,000 | $ 0 | $ 0 |  |  |
Series C Warrants [Member] | Securities Purchase Agreement [Member] | Warrant Repurchase Agreements [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate amount to be paid in exchange for cancellation of warrants | $ |  |  |  |  | $ 7,900,000 |  |  |  |  |  |  |  |  |  |
Series C Warrants [Member] | Senior Secured Convertible Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of warrants converted |  |  |  |  | 19,368 |  |  |  |  |  |  |  |  |  |
Debt instrument, principal face amount | $ |  |  |  |  | $ 35,000,000 |  |  |  |  |  |  |  |  |  |
Series C Warrants [Member] | Senior Secured Convertible Notes [Member] | Securities Purchase Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares issuable upon warrants exercised |  |  |  |  |  |  |  |  |  |  |  |  | 20,000 |  |
October 2016 Warrants [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants issued to purchase Common Stock |  |  |  | 425 |  |  |  |  |  |  |  |  |  |  |
Value of warrants issued | $ |  |  |  | $ 300,000 |  |  |  |  |  |  |  |  |  |  |
Warrants exercisable per share price (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  | $ 49.00 | $ 49.00 |  |  |  |  |
Number of warrants outstanding (in shares) |  |  |  |  |  |  |  |  | 225 | 225 |  |  |  |  |
Term period for warrants |  |  |  |  |  |  |  |  |  | 5 years |  |  |  |  |
Warrants exercised (in shares) |  |  |  |  |  |  |  |  |  |  | 200 |  |  |  |
Net proceeds from exercise of warrants | $ |  |  |  |  |  |  |  |  |  |  | $ 100,000 |  |  |  |
November 2017 Warrants [Member] | Exchange Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants issued to purchase Common Stock |  |  | 7,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Value of warrants issued | $ |  |  | $ 14,400,000 |  |  |  |  |  |  |  |  |  |  |  |
Warrants exercisable per share price (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  | $ 2.45 | $ 2.45 |  |  |  |  |
Number of warrants outstanding (in shares) |  |  |  |  |  |  |  |  | 7,000,000 | 7,000,000 |  |  |  |  |
Term period for warrants |  |  |  |  |  |  |  |  |  | 5 years |  |  |  |  |
Number of investors | Investor |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |

X
- Definition Gross proceeds from underwriting offering. + References No definition available. + Details
Name: | dcth_GrossProceedsFromUnderwritingOffering
Namespace Prefix: | dcth_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Number of investors. + References No definition available. + Details
Name: | dcth_NumberOfInvestors
Namespace Prefix: | dcth_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Proceeds from issuance of private placement gross. + References No definition available. + Details
Name: | dcth_ProceedsFromIssuanceOfPrivatePlacementGross
Namespace Prefix: | dcth_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Remaining outstanding warrants expired. + References No definition available. + Details
Name: | dcth_RemainingOutstandingWarrantsExpired
Namespace Prefix: | dcth_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Securities issuable to raise capital authorized amount. + References No definition available. + Details
Name: | dcth_SecuritiesIssuableToRaiseCapitalAuthorizedAmount
Namespace Prefix: | dcth_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Stock issued during period shares warrants exercised. + References No definition available. + Details
Name: | dcth_StockIssuedDuringPeriodSharesWarrantsExercised
Namespace Prefix: | dcth_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Stockholders equity note. + References No definition available. + Details
Name: | dcth_StockholdersEquityNoteLineItems
Namespace Prefix: | dcth_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Term period of warrants in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | dcth_TermPeriodForWarrants
Namespace Prefix: | dcth_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The fair value allocated to warrants issued. + References No definition available. + Details
Name: | dcth_ValueOfWarrantsIssued
Namespace Prefix: | dcth_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Warrants exercise price description. + References No definition available. + Details
Name: | dcth_WarrantsExercisePriceDescription
Namespace Prefix: | dcth_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Expiration date of warrants, beginning on the date of issuance. + References No definition available. + Details
Name: | dcth_WarrantsExpiryPeriod
Namespace Prefix: | dcth_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of warrants issued during the period to purchase common shares. + References No definition available. + Details
Name: | dcth_WarrantsIssuedDuringPeriodShares
Namespace Prefix: | dcth_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Expiration date of warrants held. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column A + Details
Name: | invest_InvestmentWarrantsExpirationDate
Namespace Prefix: | invest_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(4)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
Name: | us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares. + References No definition available. + Details
Name: | us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
Name: | us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
Name: | us-gaap_ClassOfWarrantOrRightOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399 + Details
Name: | us-gaap_DebtInstrumentFaceAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Total units issued during the year due to the sale of units. All partners include general, limited and preferred partners. + References Reference 1: 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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 272 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055 + Details
Name: | us-gaap_PartnersCapitalAccountUnitsSaleOfUnits
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The aggregate amount paid by the entity to reacquire the right to purchase equity shares at a predetermined price, usually issued together with corporate debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585 + Details
Name: | us-gaap_PaymentsForRepurchaseOfWarrants
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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 -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&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 associated with the amount received from entity's raising of capital via private rather than public placement. + 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=98514028&loc=d3e3255-108585 + Details
Name: | us-gaap_ProceedsFromIssuanceOfPrivatePlacement
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The cash inflow associated with the amount received from holders exercising their stock warrants. + References No definition available. + Details
Name: | us-gaap_ProceedsFromWarrantExercises
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Number of shares issued during the period as a result of the conversion of convertible securities. + References Reference 1: 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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29-30) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: 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=84159872&loc=d3e21463-112644 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21475-112644 + Details
Name: | us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
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 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: 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=84159872&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: 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 + Details
Name: | us-gaap_StockIssuedDuringPeriodSharesNewIssues
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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

X
- Details
Name: | us-gaap_TransactionTypeAxis=dcth_SecuritiesPurchaseAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TypeOfArrangementAxis=dcth_WarrantRepurchaseAgreementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=us-gaap_CommonStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=us-gaap_RightsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=dcth_WarrantsTwoThousandAndThirteenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=dcth_WarrantsFebruaryTwoThousandAndFifteenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=dcth_SeriesCWarrantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=dcth_WarrantsOctoberTwoThousandAndSixteenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=dcth_WarrantsNovemberTwoThousandAndSeventeenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TransactionTypeAxis=dcth_ExchangeAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |