Consolidated Statements of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Cumulative effect, change in accounting	Common stock	Additional Paid-In Capital	Additional Paid-In Capital	Additional Paid-In Capital Cumulative effect, change in accounting
Balances (in shares) at Dec. 31, 2018			26,779
Balances at Dec. 31, 2018	$ 315,152	$ (12,272)	$ 268	$ 435,245	$ (120,361)	$ (12,272)
Accounting standards update [extensible list]	us-gaap:AccountingStandardsUpdate201602Member
Issuance of stock on options exercised and restricted stock units vested (in shares)			53
Issuance of stock on options exercised and restricted stock units vested	$ 0
Share-based compensation	4,140			4,140
Share issuance related to business combination (in shares)			911
Share issuance related to business combination	16,608		$ 9	16,599
Tax benefit from share-based compensation	(288)			(288)
Net loss	(8,018)				(8,018)
Balances (in shares) at Mar. 31, 2019			27,743
Balances at Mar. 31, 2019	315,322		$ 277	455,696	(140,651)
Balances (in shares) at Dec. 31, 2018			26,779
Balances at Dec. 31, 2018	315,152	$ (12,272)	$ 268	435,245	(120,361)	$ (12,272)
Net loss	(31,873)
Balances (in shares) at Sep. 30, 2019			27,813
Balances at Sep. 30, 2019	296,211		$ 278	460,439	(164,506)
Balances (in shares) at Mar. 31, 2019			27,743
Balances at Mar. 31, 2019	315,322		$ 277	455,696	(140,651)
Issuance of stock on options exercised and restricted stock units vested (in shares)			57
Issuance of stock on options exercised and restricted stock units vested	56		$ 1	55
Share-based compensation	2,122			2,122
Tax benefit from share-based compensation	(3)			(3)
Net loss	(14,408)				(14,408)
Balances (in shares) at Jun. 30, 2019			27,800
Balances at Jun. 30, 2019	303,089		$ 278	457,870	(155,059)
Issuance of stock on options exercised and restricted stock units vested (in shares)			13
Issuance of stock on options exercised and restricted stock units vested	0
Share-based compensation	2,578			2,578
Tax benefit from share-based compensation	(9)			(9)
Net loss	(9,447)				(9,447)
Balances (in shares) at Sep. 30, 2019			27,813
Balances at Sep. 30, 2019	296,211		$ 278	460,439	(164,506)
Balances (in shares) at Dec. 31, 2019			27,879
Balances at Dec. 31, 2019	289,744		$ 279	461,643	(172,178)
Issuance of stock on options exercised and restricted stock units vested (in shares)			172
Issuance of stock on options exercised and restricted stock units vested	2		$ 2
Share-based compensation	2,153			2,153
Tax benefit from share-based compensation	(428)			(428)
Net loss	(32,620)				(32,620)
Balances (in shares) at Mar. 31, 2020			28,051
Balances at Mar. 31, 2020	258,851		$ 281	463,368	(204,798)
Balances (in shares) at Dec. 31, 2019			27,879
Balances at Dec. 31, 2019	289,744		$ 279	461,643	(172,178)
Net loss	(118,142)
Balances (in shares) at Sep. 30, 2020			28,181
Balances at Sep. 30, 2020	178,574		$ 282	468,612	(290,320)
Balances (in shares) at Mar. 31, 2020			28,051
Balances at Mar. 31, 2020	258,851		$ 281	463,368	(204,798)
Issuance of stock on options exercised and restricted stock units vested (in shares)			73
Issuance of stock on options exercised and restricted stock units vested	0
Share-based compensation	1,755			1,755
Net loss	(78,566)				(78,566)
Balances (in shares) at Jun. 30, 2020			28,124
Balances at Jun. 30, 2020	182,040		$ 281	465,123	(283,364)
Issuance of stock on options exercised and restricted stock units vested (in shares)			57
Issuance of stock on options exercised and restricted stock units vested	1		$ 1
Share-based compensation	3,510			3,510
Tax benefit from share-based compensation	(21)			(21)
Net loss	(6,956)				(6,956)
Balances (in shares) at Sep. 30, 2020			28,181
Balances at Sep. 30, 2020	$ 178,574		$ 282	$ 468,612	$ (290,320)