Related party transactions:

12 Months Ended

Dec. 31, 2017

Related party transactions:

Related party transactions:

9. Related party transactions:

Office lease

        The Company's headquarters was located in an office building owned by Niobium LLC (a successor to 6715 Kenilworth Avenue Partnership). The two owners of Niobium LLC are the Company's Chief Executive Officer, David Schaeffer, who has a 51% interest in Niobium LLC and his wife who has a 49% interest. The lease was scheduled to end on August 31, 2016 and was cancellable by the Company upon 60 days' notice. The Company terminated the lease effective as of May 10, 2015. In April 2015, the Company entered into a new lease agreement for its headquarters building with Sodium LLC whose two owners are the Company's Chief Executive Officer, who has a 51% interest in Sodium LLC and his wife who has a 49% interest. The Company moved into the new headquarters building in May 2015. The fixed annual rent for the new headquarters building is $1.0 million per year plus an allocation of taxes and utilities. The lease term is for five years and is cancellable by the Company upon 60 days' notice. The Company's audit committee reviews and approves all transactions with related parties. The Company paid $1.6 million in 2017, $1.7 million in 2016 and $1.2 million in 2015, respectively for rent and related costs (including taxes and utilities) to these lessors for these leases, respectively.