Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2019

Accounting Policies [Abstract]

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs

Stock-based compensation expense charged to the Condensed Consolidated Statements of Operations is as follows:

	Three months ended June 30,				Six months ended June 30,
(dollars in thousands)	2019		2018		2019		2018
Stock-based compensation expense	$	993	$	1,166	$	1,935	$	1,456