Accounts Payable and Accured Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Compensation and benefit-related liabilities (1)	$ 13,772	$ 22,193
Royalties	13,272	13,512
Accounts payable	4,144	4,219
Purchase of unrestricted common stock (2)	2,560	1,937
Facilities	1,964	1,824
Legal	1,474	1,602
Market linkage	1,847	1,157
Other	8,776	6,514
Accounts payable and accrued liabilities	$ 47,809	$ 52,958

Total accrued expenses related to market linkage.

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Total accrued expenses related to Company's facilities

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Represents accrued legal fees recorded as a current liability

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Liability for treasury shares purchased at the end of the current period that have not been settled due to three day settlement period

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Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.

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Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Carrying value as of the balance sheet date of obligations incurred through that date and payable for royalties. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Total of the carrying values as of the balance sheet date of obligations incurred through that date and payable for obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Aggregate carrying amount of current liabilities (due within one year or within the normal operating cycle if longer) not separately disclosed in the balance sheet. Includes costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered and of liabilities not separately disclosed.

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