Stock Based Compensation - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	May 28, 2014
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Number of options granted (in shares)	0	0
Number of options exercised (in shares)	0	0
Options, intrinsic value, vested	$ 0	$ 0
Options, intrinsic value, unvested	0	0
Options, intrinsic value, exercised	0	0
Stock-based compensation, tax benefit	0	0
Compensation costs capitalized as part of the cost of an asset	0	$ 0
Additional Paid-In Capital
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Revision to allocated stock-based compensation expense	110,000
Unvested Awards, Forfeited | Additional Paid-In Capital
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Revision to allocated stock-based compensation expense	48,000
Performance-based Awards, Revised Estimates | Additional Paid-In Capital
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Revision to allocated stock-based compensation expense	$ 62,000
Stock Options
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Number of options granted (in shares)	0	0
Number of stock options outstanding (in shares)	1,222,000	1,269,000	1,350,000
Number of options exercised (in shares)	0	0
Unrecognized stock-based compensation expense for stock options	$ 18,000
Weighted average period for amortization of unrecognized stock-based compensation, stock options	3 months
Restricted Stock
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Unrecognized stock-based compensation expense for stock options	$ 233,000
Weighted average period for amortization of unrecognized stock-based compensation, stock options	6 months
Shares withheld and repurchased to satisfy tax obligations (in shares)	68,000	241,000
Stock-based compensation expense in lieu of payment of cash bonus	$ 93,000
Granted, restricted shares (in shares)	170,000	0
Stock-based compensation, cash bonus earned			$ 84,000
Unrecognized stock-based compensation expense, stock options, upon change in control, value	$ 155,000
Restricted Stock | Shares Withheld and Repurchased
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Shares withheld and repurchased to satisfy tax obligations (in shares)	25,000
Tax obligations relating to the vesting of shares	$ 13,000
Stock options outstanding
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Unrecognized stock-based compensation expense for stock options	$ 1,526,000
Shares withheld and repurchased to satisfy tax obligations (in shares)	387,000	0
Granted, restricted shares (in shares)	2,261,000	2,969,000
Stock-based compensation arrangement, vested in period, remain outstanding (in shares)	387,000
Time-based Restricted Stock Awards
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Unrecognized stock-based compensation expense for stock options	$ 78,000
Time-based Restricted Stock Units
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Unrecognized stock-based compensation expense for stock options	$ 445,000
Weighted average period for amortization of unrecognized stock-based compensation, stock options	8 months
Performance-based Restricted Stock Units
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Unrecognized stock-based compensation expense for stock options	$ 1,081,000
2014 Equity Incentive Plan
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Number of shares available for grant (in shares)	648,000			4,400,000
Number of options granted (in shares)	2,431,000	2,969,000
2007 Stock Incentive Plan | Stock Options
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Number of stock options outstanding (in shares)	1,209,000
2007 Stock Incentive Plan | Restricted Stock
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Number of non-option equity instruments, outstanding (in shares)	193,000
2000 Stock Incentive Plan | Stock Options
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Number of stock options outstanding (in shares)	13,000