9. Long-Term Debt and Credit Facilities

Debt outstanding consists of the following:


	June 30, 2013		December 31, 2012
	Carrying	Estimated	Carrying	Estimated
	Amount	Fair Value	Amount	Fair Value

Revolving line of credit, due August 2013	$ 6,542,094	$ 6,549,461	$ 7,253,017	$ 7,277,084
Term note, due December 2013	2,000,000	2,000,000	4,000,000	4,000,000
Healthcare Royalty Partners debt	18,589,302	18,589,302	16,248,075	16,248,075
Subordinated convertible debentures	2,739,084	2,739,084	1,588,134	1,588,134
Total debt	29,870,480	29,877,847	29,089,226	29,113,293
Less current maturities	(12,061,454)	(12,068,821)	(12,264,490)	(12,288,557)
Total long term debt	$ 17,809,026	$ 17,809,026	$ 16,824,736	$ 16,824,736

Revolving line of credit

In September 2011, the Company amended its agreement with its primary lender. The amendment reduced the availability amount of all credit extensions, other than the term loan, from $30 million to $20 million, and modified the interest rate applicable to the term loan from the lender’s prime rate plus 3.5% to the lender’s prime rate plus 5.5%.

On November 30, 2011, the Company entered into a Second Amended and Restated Loan and Security Agreement with its primary lender (“Amended Loan Agreement”). Under the Amended Loan Agreement, the Company agreed to revised tangible net worth and liquidity ratio covenants. Further, certain intellectual property assets of the Company were added to the collateral which secures repayment of the loan. Finally, the Amended Loan Agreement permits the Company to repay Healthcare Royalty Partners II, L.P. (“Healthcare Royalty Partners”), formerly “Cowen Healthcare Royalty Partners II, L.P.”, with the royalties due to the Company under the Biosense Agreement (the "Biosense Agreement"), as described below.

On March 30, 2012, the Company amended its agreement with its primary lender. The amendment extended the maturity date of the working capital line of credit from March 31, 2012 to April 30, 2012 and reduced the Company’s borrowing availability by $3,333,333. The Company also received from stockholders, who at the time were affiliates of two members of our board of directors (the “Lenders”) and were considered to be related parties, an extension of their commitment to provide $10 million in loan guarantees until April 30, 2012. As a result of this extension, the Company issued the Lenders warrants to purchase 75,735 shares of common stock at $6.60 per share.

On May 1, 2012, the Company and its primary lender entered into an agreement in which the lender extended the maturity of the revolving line of credit from April 30, 2012 to May 15, 2012. The Company and the Lenders also agreed to amend their agreement to extend the $10 million loan guarantee through May 15, 2012. The Company granted warrants to purchase an aggregate of 60,976 shares of common stock in exchange for the extension of the guarantee.

On May 10, 2012, upon closing of financing transactions for gross proceeds of $18.5 million, the Company entered into the Third Loan Modification Agreement with its primary lender. The amendment extended the revolving credit facility maturity to March 31, 2013 and revised the financial covenants. Additionally, the revolving line of credit was decreased from $20 million to $13 million. The reduction was as a result of the pay down of $7 million of the guarantees provided by the Lenders.

On March 29, 2013, the Company amended its agreement with its primary lender. The amendment extended the maturity date of the working capital line of credit from March 31, 2013 to June 30, 2013. The Company and the Lenders also agreed to extend until June 30, 2013 the $3 million guarantee. As a result of this extension, the Company issued the Lenders warrants to purchase 113,636 shares of common stock at $1.98 per share.

On June 28, 2013, the Company amended its agreement with its primary lender. The amendment extended the maturity date of the working capital line of credit from June 30, 2013 to July 31, 2013, and decreased the amount of available advances from $13 million to $6 million. In addition, the Bank waived the testing of the tangible net worth and liquidity ratio financial covenants under the Amended Loan Agreement for the period ended June 30, 2013. The Company and the Lenders also agreed to extend until July 31, 2013 the $3 million guarantee. As a result of this extension, the Company issued the Lenders warrants to purchase 48,387 shares of common stock at $1.55 per share.

On July 31, 2013, the Company amended its agreement with its primary lender. The amendment extended the maturity date of the working capital line of credit from July 31, 2013 to August 31, 2013. In addition, the Bank waived the testing of the liquidity ratio financial covenant under the Amended Loan Agreement for the period ended July 31, 2013. The Company and the Lenders also agreed to extend until August 31, 2013 the $3 million guarantee. As a result of this extension, the Company issued the Lenders warrants to purchase 14,313 shares of common stock at $5.24 per share.

As of June 30, 2013, the Company had $6.5 million outstanding 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 June 30, 2013, the Company had a borrowing capacity of $6.5 million based on the Company’s collateralized assets, including amounts already drawn. As such, the Company had no remaining ability to borrow under the revolving line of credit at June 30, 2013.

The revolving line of credit and the Company’s term notes (collectively, the “Credit Agreements”) are secured by substantially all of the Company’s assets. The Company is also required under the Credit Agreements to maintain its primary operating account and the majority of its cash and investment balances in accounts with the primary lender.

Term note

Under the 2010 amendment to the loan agreement, the Company entered into a $10 million term loan maturing on December 31, 2013, with $2 million of principal due in 2011 and $4 million of principal due in each of 2012 and 2013. Interest on the term loan accrued at the rate of prime plus 3.5%. Under the September 2011 amendment of the loan agreement, the interest rate on the term loan was increased to prime plus 5.5%. Under this agreement, the Company provided its primary lender with warrants to purchase 11,111 shares of common stock. The warrants are exercisable at $36.00 per share, beginning on December 17, 2010 and expiring on December 17, 2015. The fair value of these warrants of $228,332, calculated using the Black-Scholes method, will be deferred and amortized to interest expense ratably over the life of the term loan.

Healthcare Royalty Partners Debt

In November 2011, the Company entered into a loan agreement with Healthcare Royalty Partners. Under the agreement the Company borrowed from Healthcare Royalty Partners $15 million. 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 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 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 system sales for the twelve months ended December 31, 2012. The loan will 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 relates to the development and distribution of magnetically enabled catheters used with Stereotaxis' Niobe system in cardiac ablation procedures. Under the terms of the Agreement, Healthcare Royalty Partners will be entitled to receive 100% of all royalties due to the Company under the Biosense Agreement until the loan is repaid. The loan is a full recourse loan, matures on December 31, 2018, and bears 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 are insufficient to pay all amounts of interest due on the loan, then such deficiency will increase the outstanding principal amount on the loan. After the loan obligation is repaid, the royalties under the Biosense Agreement will again be paid to the Company. The loan is also secured by certain assets and intellectual property of the Company. The Agreement also contains customary affirmative and negative covenants. The use of payments due to the Company under the Biosense Agreement was approved by our primary lender under the Amended Loan Agreement described above.

Subordinated Convertible Debentures

In May 2012, the Company entered into a securities purchase agreement with certain institutional investors whereby the Company agreed to sell an aggregate of approximately $8.5 million in aggregate principal amount of unsecured, subordinated, convertible debentures (the “Debentures”), which became convertible into shares of the Company’s common stock at a conversion price of $3.361 per share (or approximately 2.5 million shares in the aggregate), on July 10, 2012, the date that the Company received shareholder approval for the transaction. The purchasers of the Debentures also received six-year warrants to purchase an aggregate of approximately 2.5 million shares of the Company’s common stock at an exercise price of $3.361 per share. The Debentures bear interest at 8% per year and mature on May 7, 2014. In addition, the Company has the ability to issue shares of its common stock in lieu of cash interest payments under certain circumstances, and intends to do so at such time as the Company has registered the shares for resale.

The Company recorded the Debentures on the balance sheet net of the debt discount. The debt discount of $7.5 million is due to warrants issued in conjunction with the Debentures and the debt conversion features. Upon issuance of the Debentures, the fair value of the warrants and derivative liability were $4.1 million and $3.5 million, respectively. The debt discount will be amortized over the life of the loan using the effective interest method and the warrants and derivative liability will be recorded at fair value on each reporting period. Refer to Note 11 for additional discussion of the fair value of the warrants and conversion features.

Refer to Note 14 for discussion of subsequent events.