Condensed Consolidated Statements of Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Treasury Stock	Retained Earnings
Beginning balance (in shares) at Dec. 31, 2018		34,457
Beginning balance at Dec. 31, 2018	$ 158,491	$ 34	$ 96,486	$ (1,410)	$ (49,733)	$ 113,114
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(14,424)					(14,424)
Other comprehensive income (loss)	(156)			(156)
Treasury Stock, Value, Acquired, Cost Method	(722)				(722)
Restricted stock release (in shares)		200
Employee stock purchase plan release (in shares)		2
Employee stock purchase plan release	13		13
Stock-based compensation expense	1,185		1,185
Payment of withholding taxes on restricted stock units	(782)		(782)
Shares issued as consideration for acquisition (in shares)		1,458
Shares issued as consideration for acquisition	12,969	$ 2	12,967
Ending balance (in shares) at Mar. 31, 2019		36,117
Ending balance at Mar. 31, 2019	156,535	$ 36	109,869	(1,566)	(50,455)	98,651
Beginning balance (in shares) at Dec. 31, 2019		36,610
Beginning balance at Dec. 31, 2019	191,479	$ 37	116,533	(1,631)	(50,455)	126,995
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(75,555)					(75,555)
Other comprehensive income (loss)	280			280
Restricted stock release (in shares)		270
Employee stock purchase plan release (in shares)		4
Employee stock purchase plan release	39		39
Stock-based compensation expense	1,294		1,294
Payment of withholding taxes on restricted stock units	(314)		(314)
Ending balance (in shares) at Mar. 31, 2020		36,884
Ending balance at Mar. 31, 2020	$ 116,864	$ 37	$ 117,552	$ (1,351)	$ (50,455)	$ 51,081