Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Total	Common Shares [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Beginning Balance at Dec. 31, 2016	$ 263,477	$ 1,783	$ 204,095	$ 64,179	$ (6,580)
Balance, Shares at Dec. 31, 2016		17,828,155
Net income (loss)	6,223			6,223
Other comprehensive income (loss), net of tax	10,367				10,367
Share-based compensation	12,557		12,557
Common shares issued	3,984	$ 45	3,939
Common shares issued, Shares		450,678
Ending Balance at Dec. 31, 2017	296,608	$ 1,828	220,591	70,402	3,787
Balance, Shares at Dec. 31, 2017		18,278,833
Cumulative effect adjustment from adoption | ASU 2014-09 [Member]	4,761			4,761
Cumulative effect adjustment from adoption | ASU 2016-16 [Member]	(1,896)			(1,896)
Net income (loss)	13,811			13,811
Other comprehensive income (loss), net of tax	(491)				(491)
Share-based compensation	18,930		18,930
Common shares issued	3,674	$ 30	3,644
Common shares issued, Shares		300,855
Ending Balance at Dec. 31, 2018	$ 335,397	$ 1,858	243,165	87,078	3,296
Balance, Shares at Dec. 31, 2018	18,579,688	18,579,688
Cumulative effect adjustment from adoption | ASU 2016-02 [Member]	$ 70			70
Cumulative effect adjustment from adoption | ASU 2018-02 [Member]	937			(937)	937
Net income (loss)	(28,462)			(28,462)
Other comprehensive income (loss), net of tax	(7,272)				(7,272)
Share-based compensation	21,540		21,540
Common shares issued	6,358	$ 44	6,314
Common shares issued, Shares		442,931
Ending Balance at Dec. 31, 2019	$ 327,631	$ 1,902	$ 271,019	$ 57,749	$ (3,039)
Balance, Shares at Dec. 31, 2019	19,022,619	19,022,619