Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Dec. 31, 2019	0	20,140
Balance at Dec. 31, 2019	$ 0	$ 20	$ 303,401	$ 430	$ (30,057)	$ 273,794
Public offering of common stock, net (in shares)	0	4
Public offering of common stock, net	$ (0)	$ (0)	75	(0)	(0)	75
Issuance of restricted stock, net of shares withheld for employee tax (in shares)	0	105
Issuance of restricted stock, net of shares withheld for employee tax	$ 0	$ 0	(259)	0	0	(259)
Share-based compensation	0	0	3,238	0	0	3,238
Foreign currency translation adjustment	0	0	0	(2,402)	0	(2,402)
Net loss	0	0	0	0	(16,797)	(16,797)
Public offering of common stock, net	$ 0	$ 0	(75)	0	0	(75)
Balance (in shares) at Mar. 31, 2020	0	20,249
Balance at Mar. 31, 2020	$ 0	$ 20	306,305	(1,972)	(46,854)	257,499
Balance (in shares) at Dec. 31, 2020	0	25,110
Balance at Dec. 31, 2020	$ 0	$ 25	354,685	11,690	(88,509)	277,891
Public offering of common stock, net (in shares)	0	1,511
Public offering of common stock, net	$ 0	$ 2	14,966	0	0	$ 14,968
Stock options exercised, net of shares withheld for employee tax (in shares)	0	2				2
Stock options exercised, net of shares withheld for employee tax	$ 0	$ 0	8	0	0	$ 8
Issuance of restricted stock, net of shares withheld for employee tax (in shares)	0	164
Issuance of restricted stock, net of shares withheld for employee tax	$ 0	$ 0	(258)	0	0	(258)
Share-based compensation	0	0	2,519	0	0	2,519
Foreign currency translation adjustment	0	0	0	(1,034)	0	(1,034)
Net loss	0	0	0	0	(15,622)	(15,622)
Public offering of common stock, net	$ 0	$ (2)	(14,966)	0	0	(14,968)
Balance (in shares) at Mar. 31, 2021	0	26,787
Balance at Mar. 31, 2021	$ 0	$ 27	$ 371,920	$ 10,656	$ (104,131)	$ 278,472