Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2017

Stock-Based Compensation

Summary of the status of restricted stock units

	Number of Shares			Weighted Remaining Contractual Life (Years)		Aggregate Intrinsic Value ($)
Nonvested as of January 1, 2016		7,301			2.13	$	1,587
Shares granted		6,375					—
Shares forfeited		(250	)				—
Shares vested		(4,539	)				—
Nonvested as of December 31, 2016		8,887			2.01		1,567
Shares granted		—					—
Shares forfeited		(1,192	)				—
Shares vested		(2,295	)				—
Nonvested as of December 31, 2017		5,400			1.33	$	1,633