Long-Term Debt And Credit Facilities	9 Months Ended
Sep. 30, 2017
Long-Term Debt And Credit Facilities [Abstract]
Long-Term Debt And Credit Facilities	9. Long-Term Debt and Credit Facilities Revolving Line of Credit The Company has had a working capital line of credit with its primary lender, Silicon Valley Bank, since 2004. The revolving line of credit is secured by substantially all of the Company’s assets. As of September 30, 2017, the maximum available under the line was $10.0 million subject to the value of certain collateralized assets. The Company is required under the revolving line of credit to maintain its primary operating account and the majority of its cash and investment balances in accounts with its primary lender. The facility was amended on March 27, 2015, extending the maturity date to March 31, 2018 and on May 10, 2016, the Company and the primary lender agreed to modify certain financial covenants. The amended agreement requires the Company to maintain a liquidity ratio greater than 1.50:1.00, excluding certain short term advances from the calculation, and a minimum tangible net worth of not less than (no worse than) negative $24.0 million for the quarters ended June 30, 2016, September 30, 2016, December 31, 2016, March 31, 2017, June 30, 2017, and September 30, 2017; and not less than (no worse than) negative $24.5 million for the quarters ended December 31, 2017 and March 31, 2018. As of September 30, 2017, the Company is in compliance with its loan covenants. As of September 30, 2017, the Company had no outstanding balance under the revolving line of credit. Draws on the line of credit are made based on the borrowing capacity one week in arrears. As of September 30, 2017, the Company had a borrowing capacity of $3.0 million based on the Company’s collateralized assets. The Company’s total liquidity as of September 30, 2017, was $7.5 million which included cash and cash equivalents of $4.5 million. On November 7, 2017, the Company entered into a Third Amended and Restated Loan Agreement with Silicon Valley Bank (“Modification Agreement”), amending the terms of the Second Amended and Restated Loan and Security Agreement (Domestic) dated November 30, 2011 (as amended and as in effect immediately prior to the effectiveness of the Modification Agreement). The Modification Agreement provided for, among other terms and provisions, an adjustment in the maximum availability under the Company’s revolving line of credit from $10.0 million to $5.0 million with the pro-rata reduction in related loan costs, as well as a reduction in the interest rate floor from 7.0% to 5.75%. This change should have no impact on the Company’s typical borrowing capacity. Healthcare Royalty Partners Debt In November 2011, the Company entered into a loan agreement with Healthcare Royalty Partners. Under the agreement the Company borrowed $15 million from Healthcare Royalty Partners. The Company was permitted to borrow up to an additional $5 million in the aggregate based on the achievement by the Company of certain milestones related to Niobe ES system sales in 2012. On August 8, 2012, the Company borrowed an additional $2.5 million based upon achievement of a milestone related to Niobe ES system sales for the nine months ended June 30, 2012. On January 31, 2013, the Company borrowed an additional $2.5 million based upon achievement of a milestone related to Niobe ES system sales for the twelve months ended December 31, 2012. The loan was to be repaid through, and secured by, royalties payable to the Company under its Development, Alliance and Supply Agreement with Biosense Webster, Inc. (the “Biosense Agreement”). The Biosense Agreement relates to the development and distribution of magnetically enabled catheters used with Stereotaxis' Niobe ES system in cardiac ablation procedures. Under the terms of the agreement, Healthcare Royalty Partners was entitled to receive 100% of all royalties due to the Company under the Biosense Agreement until the loan was repaid. The loan was a full recourse loan, scheduled to mature on December 31, 2018, and included interest at an annual rate of 16% payable quarterly with royalties received under the Biosense Agreement. If the payments received by the Company under the Biosense Agreement were insufficient to pay all amounts of interest due on the loan, then such deficiency would have increased the outstanding principal amount on the loan. The loan was also secured by certain assets and intellectual property of the Company. The agreement also contained customary affirmative and negative covenants. The use of payments due to the Company under the Biosense Agreement was approved by our primary lender. In September 2016, the Company extinguished the remainder of the debt of $18.1 million, net of deferred financing costs of approximately $0.3 million, as well as accrued interest of $0.5 million for $13.0 million based upon an agreement entered into with Healthcare Royalty Partners. Following the repayment of the loan obligation, the royalties under the Biosense Agreement are now paid to the Company. As a result of the debt extinguishment, the Company recognized a net gain of $5.6 million in 2016.

9. Long-Term Debt and Credit Facilities

Revolving Line of Credit

The Company has had a working capital line of credit with its primary lender, Silicon Valley Bank, since 2004. The revolving line of credit is secured by substantially all of the Company’s assets. As of September 30, 2017, the maximum available under the line was $10.0 million subject to the value of certain collateralized assets. The Company is required under the revolving line of credit to maintain its primary operating account and the majority of its cash and investment balances in accounts with its primary lender. The facility was amended on March 27, 2015, extending the maturity date to March 31, 2018 and on May 10, 2016, the Company and the primary lender agreed to modify certain financial covenants. The amended agreement requires the Company to maintain a liquidity ratio greater than 1.50:1.00, excluding certain short term advances from the calculation, and a minimum tangible net worth of not less than (no worse than) negative $24.0 million for the quarters ended June 30, 2016, September 30, 2016, December 31, 2016, March 31, 2017, June 30, 2017, and September 30, 2017; and not less than (no worse than) negative $24.5 million for the quarters ended December 31, 2017 and March 31, 2018. As of September 30, 2017, the Company is in compliance with its loan covenants.

As of September 30, 2017, the Company had no outstanding balance under the revolving line of credit. Draws on the line of credit are made based on the borrowing capacity one week in arrears. As of September 30, 2017, the Company had a borrowing capacity of $3.0 million based on the Company’s collateralized assets. The Company’s total liquidity as of September 30, 2017, was $7.5 million which included cash and cash equivalents of $4.5 million.

On November 7, 2017, the Company entered into a Third Amended and Restated Loan Agreement with Silicon Valley Bank (“Modification Agreement”), amending the terms of the Second Amended and Restated Loan and Security Agreement (Domestic) dated November 30, 2011 (as amended and as in effect immediately prior to the effectiveness of the Modification Agreement). The Modification Agreement provided for, among other terms and provisions, an adjustment in the maximum availability under the Company’s revolving line of credit from $10.0 million to $5.0 million with the pro-rata reduction in related loan costs, as well as a reduction in the interest rate floor from 7.0% to 5.75%. This change should have no impact on the Company’s typical borrowing capacity.

Healthcare Royalty Partners Debt

In November 2011, the Company entered into a loan agreement with Healthcare Royalty Partners. Under the agreement the Company borrowed $15 million from Healthcare Royalty Partners. The Company was permitted to borrow up to an additional $5 million in the aggregate based on the achievement by the Company of certain milestones related to Niobe ES system sales in 2012. On August 8, 2012, the Company borrowed an additional $2.5 million based upon achievement of a milestone related to Niobe ES system sales for the nine months ended June 30, 2012. On January 31, 2013, the Company borrowed an additional $2.5 million based upon achievement of a milestone related to Niobe ES system sales for the twelve months ended December 31, 2012. The loan was to be repaid through, and secured by, royalties payable to the Company under its Development, Alliance and Supply Agreement with Biosense Webster, Inc. (the “Biosense Agreement”). The Biosense Agreement relates to the development and distribution of magnetically enabled catheters used with Stereotaxis' Niobe ES system in cardiac ablation procedures. Under the terms of the agreement, Healthcare Royalty Partners was entitled to receive 100% of all royalties due to the Company under the Biosense Agreement until the loan was repaid. The loan was a full recourse loan, scheduled to mature on December 31, 2018, and included interest at an annual rate of 16% payable quarterly with royalties received under the Biosense Agreement. If the payments received by the Company under the Biosense Agreement were insufficient to pay all amounts of interest due on the loan, then such deficiency would have increased the outstanding principal amount on the loan. The loan was also secured by certain assets and intellectual property of the Company. The agreement also contained customary affirmative and negative covenants. The use of payments due to the Company under the Biosense Agreement was approved by our primary lender.

In September 2016, the Company extinguished the remainder of the debt of $18.1 million, net of deferred financing costs of approximately $0.3 million, as well as accrued interest of $0.5 million for $13.0 million based upon an agreement entered into with Healthcare Royalty Partners. Following the repayment of the loan obligation, the royalties under the Biosense Agreement are now paid to the Company. As a result of the debt extinguishment, the Company recognized a net gain of $5.6 million in 2016.