| Component: (Network and Table) | |
|---|---|
| Network | 00500 - Statement - Condensed Consolidated Statements of Cash Flows (http://www.exactsciences.com/role/StatementCondensedConsolidatedStatementsOfCashFlows)  | 
| Table | (Implied) | 
| Reporting Entity [Axis] | 0001124140 (http://www.sec.gov/CIK) | 
| Condensed Consolidated Statements of Cash Flows | Period [Axis] | ||
|---|---|---|---|
2016-01-01 - 2016-12-31  | 2015-01-01 - 2015-12-31  | 2014-01-01 - 2014-12-31  | |
Condensed Consolidated Statements of Cash Flows  | |||
Cash flows from operating activities:  | |||
Net loss  | (167,211,000)   | (157,803,000)   | (100,048,000)   | 
Adjustments to reconcile net loss to net cash used in operating activities:  | |||
Depreciation and amortization of fixed assets  | |||
Loss on disposal of property and equipment  | |||
Stock-based compensation  | |||
Amortization of deferred license fees  | (  | ||
Amortization of other liabilities  | (  | (  | |
Amortization of deferred financing costs  | |||
Forgiveness of long-term debt  | (  | ||
Amortization of premium on short-term investments  | |||
Amortization of intangible assets  | |||
Proceeds from refundable tax credits  | |||
Changes in assets and liabilities:  | |||
Accounts receivable, net  | (  | (  | (  | 
Inventory, net  | (  | (  | (  | 
Prepaid expenses and other current assets  | (  | (  | |
Accounts payable  | (  | ||
Accrued liabilities  | |||
Lease incentive obligation  | (  | (  | (  | 
Accrued interest  | (  | ||
Net cash used in operating activities  | (  | (  | (  | 
Cash flows from investing activities:  | |||
Purchases of marketable securities  | (  | (  | (  | 
Maturities of marketable securities  | |||
Purchases of property and equipment  | (  | (  | (  | 
Purchases of intangible assets  | (  | ||
Net cash used in investing activities  | (  | (  | (  | 
Cash flows from financing activities:  | |||
Proceeds from exercise of common stock options  | |||
Proceeds from sale of common stock, net of issuance costs  | |||
Payments on capital lease obligations  | (  | (  | |
Proceeds from mortgage payable  | |||
Payments on mortgage payable  | (  | (  | |
Proceeds from New Market Tax Credit financing agreements  | |||
Proceeds in connection with the Company's employee stock purchase plan  | |||
Net cash provided by financing activities  | |||
Effects of exchange rate on cash and cash equivalents  | (  | ||
Net increase (decrease) in cash and cash equivalents  | (  | ||
Cash and cash equivalents, beginning of period  | 41,135,000    | ||
Cash and cash equivalents, end of period  | 48,921,000    | 41,135,000    | 58,131,000    | 
Supplemental disclosure of non-cash investing and financing activities:  | |||
Property and equipment acquired but not paid  | |||
Unrealized gain on available-for-sale investments  | (  | (  | |
Issuance of 341,507, 21,826 and 32,666 shares of common stock to fund the Company's 401(k) matching contribution for 2015, 2014 and 2013, respectively  | |||
Interest paid  | |||