Quarterly Consolidated Financial Data (unaudited) - Schedule of Consolidated Quarterly Financial Information (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Quarterly Consolidated Financial Data Unaudited [Abstract]
Revenue	$ 120,558	$ 62,935	$ 61,511	$ 60,892	$ 62,780	$ 60,432	$ 77,476	$ 73,096	$ 305,896	$ 273,784	$ 255,098
Gross profit	39,587	31,511	31,911	32,019	32,668	31,454	41,736	42,421	135,028	148,279	134,595
Income (loss) before income taxes	(22,421)	6,908	6,121	8,795	10,014	8,368	17,290	17,674	(597)	53,346	59,802
Net income	$ (17,752)	$ 6,560	$ 5,526	$ 7,576	$ 8,082	$ 7,187	$ 14,697	$ 15,130	$ 1,910	$ 45,096	$ 32,909
Earnings per share:
Basic	$ (0.41)	$ 0.26	$ 0.22	$ 0.31	$ 0.32	$ 0.28	$ 0.57	$ 0.59	$ 0.06	$ 1.77	$ 1.30
Diluted	$ (0.41)	$ 0.26	$ 0.22	$ 0.30	$ 0.32	$ 0.28	$ 0.56	$ 0.58	$ 0.06	$ 1.74	$ 1.27
Weighted average number of shares outstanding:
Basic	43,609	25,079	25,032	24,863	25,146	25,655	25,621	25,463	29,729	25,470	25,325
Diluted	43,609	25,305	25,250	25,144	25,449	26,063	26,086	25,989	30,007	25,895	25,865