Related party transactions:	12 Months Ended
Related party transactions:	Dec. 31, 2013
Related party transactions:
Related party transactions:	9. Related party transactions: Office lease The Company's headquarters is located in an office building owned by Niobium LLC (a successor to 6715 Kenilworth Avenue Partnership). The two owners of the company are the Company's Chief Executive Officer, who has a 51% interest in the partnership and his wife who has a 49% interest. The Company paid $0.6 million in 2013, 2012 and in 2011 for rent and related costs (including taxes and utilities) to this company, respectively. In November 2012, the lease was extended an additional two years through August 31, 2015 and is cancellable by the Company upon 60 days' notice. The Company's audit committee reviews and approves all transactions with related parties.

The entire disclosure for related party transactions. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates.

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