Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2017

Accounting Policies [Abstract]

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]

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

	Three months ended March 31,
(dollars in thousands)	2017		2016
Stock-based compensation expense	$	832	$	1,816