CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive Income
Balance at period start (in shares) at Dec. 31, 2018		46,984
Balance at period start at Dec. 31, 2018	$ 512,329	$ 470	$ 617,937	$ (108,751)	$ 2,673
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock for business combination (in shares)		2,364
Issuance of common stock for business combination	36,980	$ 23	36,957
Stock-based compensation (in shares)		246
Stock-based compensation	1,535	$ 3	1,532
Purchase of common stock for retirement (in shares)		(44)
Purchase of common stock for retirement	(734)		(734)
Net Income (Loss)	61,092			61,092
Balance at period end (in shares) at Mar. 31, 2019		49,550
Balance at period end at Mar. 31, 2019	611,202	$ 496	655,692	(47,659)	2,673
Balance at period start (in shares) at Dec. 31, 2019		53,254
Balance at period start at Dec. 31, 2019	648,242	$ 533	715,069	(67,942)	582
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of common stock warrants (in shares)		351
Exercise of common stock warrants	3,936	$ 3	3,933
Stock-based compensation (in shares)		296
Stock-based compensation	1,615	$ 3	1,612
Purchase of common stock for retirement (in shares)		(64)
Purchase of common stock for retirement	(1,068)	$ (1)	(1,067)
Net Income (Loss)	(222,337)			(222,337)
Balance at period end (in shares) at Mar. 31, 2020		53,837
Balance at period end at Mar. 31, 2020	$ 430,388	$ 538	$ 719,547	$ (290,279)	$ 582