Net Income (Loss) per Share (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net income	$ (3,344)	$ (23)	$ 3,656	$ 2,109
Net income allocated to common shareholders	(3,259)	(22)	3,562	2,060
Restricted Stock Units (RSUs) [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Less: earnings allocated to RSUs	$ 85	$ 1	$ (94)	$ (49)

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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