| Component: (Network and Table) | |
|---|---|
| Network | 00400 - Statement - STATEMENTS OF CASH FLOWS (http://www.celldextherapeutics.com/role/StatementStatementsOfCashFlows)  | 
| Table | (Implied) | 
| Reporting Entity [Axis] | 0000744218 (http://www.sec.gov/CIK) | 
| STATEMENTS OF CASH FLOWS | Period [Axis] | ||
|---|---|---|---|
2016-01-01 - 2016-12-31  | 2015-01-01 - 2015-12-31  | 2014-01-01 - 2014-12-31  | |
STATEMENTS OF CASH FLOWS  | |||
Cash Flows From Operating Activities:  | |||
Net Loss  | (128,530,000)   | (127,197,000)   | (118,080,000)   | 
Adjustments to Reconcile Net Loss to Net Cash Used in Operating Activities:  | |||
Depreciation and Amortization  | |||
Amortization of Intangible Assets  | 997,000    | 1,013,000    | 1,013,000    | 
Amortization and Premium of Marketable Securities, Net  | |||
Realized Gain on Sales and Maturities of Marketable Securities  | (  | ||
Loss on Sale or Disposal of Assets  | |||
Stock-Based Compensation Expense  | |||
Non-Cash Expense  | |||
Changes in Operating Assets and Liabilities:  | |||
Accounts and Other Receivables  | (  | (  | |
Prepaid and Other Current Assets  | (  | (  | |
Other Assets  | (  | ||
Accounts Payable and Accrued Expenses  | (  | ||
Other Liabilities  | (  | ||
Net Cash Used in Operating Activities  | (  | (  | (  | 
Cash Flows From Investing Activities:  | |||
Sales and Maturities of Marketable Securities  | |||
Purchases of Marketable Securities  | (  | (  | (  | 
Investment in Other  | (  | ||
Cash Acquired in Kolltan Acquisition, net  | |||
Acquisition of Property and Equipment  | (  | (  | (  | 
Net Cash Provided by (Used in) Investing Activities  | (  | (  | |
Cash Flows From Financing Activities:  | |||
Net Proceeds from Stock Issuances  | |||
Proceeds from Issuance of Stock from Employee Benefit Plans  | |||
Net Cash Provided by Financing Activities  | |||
Effect of Exchange Rate Changes on Cash and Cash Equivalents  | (  | ||
Net (Decrease) Increase in Cash and Cash Equivalents  | (  | (  | |
Cash and Cash Equivalents at Beginning of Period  | 72,108,000    | ||
Cash and Cash Equivalents at End of Period  | 42,461,000    | 72,108,000    | 28,020,000    | 
Non-cash Investing Activities  | |||
Accrued construction in progress  | |||
Non-cash Supplemental Disclosure  | |||
Shares issued to former Kolltan executive for settlement of severance  | |||
Shares issued in connection with Kolltan Acquisition  | |||