Unaudited Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital.	Retained Earnings	Total
Balance at Dec. 31, 2017	$ 396	$ 148,293	$ (35,292)	$ 113,397
Equity-based compensation	5	1,240		1,245
Net income			15,470	15,470
Balance at Jun. 30, 2018	401	149,533	(19,822)	130,112
Balance at Dec. 31, 2018	401	150,926	(10,218)	141,109
Equity-based compensation	8	1,946		1,954
Net income			17,496	17,496
Balance at Jun. 30, 2019	$ 409	$ 152,872	$ 7,278	$ 160,559