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Debt Obligations
12 Months Ended
Dec. 31, 2013
Debt Obligations [Abstract]  
Debt Obligations
Debt Obligations
 
In April 2004, Lexicon purchased its existing laboratory and office buildings and animal facilities in The Woodlands, Texas with proceeds from a $34.0 million third-party mortgage financing and $20.8 million in cash.  The mortgage loan originally had a ten-year term with a 20-year amortization and a fixed interest rate of 8.23%. The mortgage was amended in September 2013 to extend the maturity date from April 2014 to April 2017, with the mortgage loan's monthly payment amount and fixed interest rate each remaining unchanged. The mortgage had a principal balance of $21.9 million as of December 31, 2013. Net proceeds from the sale of the building as discussed in Note 5, "Property and Equipment," were used to pay down the mortgage principal in June 2011 in the amount of $2.4 million.  The buildings and land that serve as collateral for the mortgage loan are included in property and equipment at $59.1 million and $2.7 million, respectively, before accumulated depreciation, as of December 31, 2013. The fair value of Lexicon’s mortgage loan approximates its carrying value.  The fair value of Lexicon’s mortgage loan is estimated using discounted cash flow analysis, based on the Company’s estimated current incremental borrowing rate.

The following table includes the aggregate future principal payments of the Company’s long-term debt as of December 31, 2013:
 
 
For the Year Ending
December 31
 
(in thousands)
2014
$
1,710

2015
1,859

2016
2,015

2017
16,293

Total debt
21,877

Less current portion
(1,710
)
Total long-term debt
$
20,167