Accounts Payable and Accrued Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Accounts Payable and Accrued Liabilities [Abstract]
Accounts payable	$ 2,661	$ 2,297
Accrued expenses	3,144	3,125
Accrued bonuses	548	964
Other accrued liabilities	251	417
Total	$ 6,604	$ 6,803