Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2016

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

The fair value of stock options granted during the year ended December 31, 2016 was estimated using the Black-Scholes option-pricing model, based on the following weighted-average assumptions:



	Weighted-Average Assumptions

Risk-free interest rate	1.1%
Term	3.06
Volatility	53%
Dividend yield	—%

Property and Equipment, Useful Lives

Depreciation and amortization is computed on a straight-line basis over the following estimated useful lives of the assets:



Furniture and fixtures	3 to 5 years
Computer hardware and software	3 to 5 years
Leasehold improvements	2 to 5 years (Lesser of lease term or useful life of improvement)

Schedule of Earnings Per Share, Basic and Diluted

The following table presents the weighted-average number of common shares outstanding used in the calculation of basic and diluted income per share:



	2016			2015			2014
Numerator (in thousands):
Basic and Diluted
Net loss	$	(54,067	)	$	(160,036	)	$	(66,029	)
Total dividends declared / paid	—			(25,434		)	(25,039		)
Dividends attributable to common stockholders	—			24,740			24,313
Net loss attributable to common stockholders – basic and diluted	$	(54,067	)	$	(160,730	)	$	(66,755	)

Denominator:
Weighted-average shares used in computing net loss per share attributable to common stockholders – basic and diluted	50,075,847			49,505,817			48,658,088

Basic and diluted net loss per common share	$	(1.08	)	$	(3.25	)	$	(1.37	)
Anti-dilutive equity-based incentive awards excluded from the computation of diluted loss per share	3,682,532			71,468			27,760