CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	(Accumulated Deficit) Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Balance (Predecessor) at Dec. 31, 2013	$ 249,231	$ 25	$ 254,446	$ (3,877)	$ (1,363)
Net income (loss) | Predecessor	(1,236)			(1,236)
Issuance of common stock | Predecessor	414,000	307	413,693
Foreign currency translation | Predecessor	(11)				(11)
Stock-based compensation expense | Predecessor	7,340		7,340
Stock options exercised | Predecessor	15,221	2	15,219
Tax benefit excess (deficiency) from stock-based compensation | Predecessor	5,270		5,270
Balance (Predecessor) at Mar. 31, 2014	275,815	27	282,275	(5,113)	(1,374)
Balance at Mar. 31, 2014	414,000	307	413,693
Close Predecessor shareholders' equity | Predecessor	(275,815)	(27)	(282,275)	5,113	1,374
Net income (loss)	(14,336)			(14,336)
Foreign currency translation	(1,560)				(1,560)
Stock-based compensation expense	3,057	6	3,051
Tax benefit excess (deficiency) from stock-based compensation	809		809
Balance at Dec. 31, 2014	401,970	313	417,553	(14,336)	(1,560)
Net income (loss)	(8,673)			(8,673)
Issuance of common stock	608	1	607
Foreign currency translation	(999)				(999)
Stock-based compensation expense	21,127	12	21,115
Stock options exercised	250		250
Tax benefit excess (deficiency) from stock-based compensation	(809)		(809)
Balance at Dec. 31, 2015	413,474	326	438,716	(23,009)	(2,559)
Net income (loss)	13,425			13,425
Issuance of common stock	173,578	80	173,498
Foreign currency translation	(1,183)				(1,183)
Stock-based compensation expense	2,777	1	2,776
Stock options exercised	678		678
Common stock issuance costs	(2,719)		(2,719)
Reclassification of liability classified stock options upon IPO	10,463		10,463
Tax benefit excess (deficiency) from stock-based compensation	25		25
Tax effect of initial public offering related costs	192		192
Balance at Dec. 31, 2016	$ 610,710	$ 407	$ 623,629	$ (9,584)	$ (3,742)