Condensed Consolidated Statements of Shareholder’s Equity - USD ($) $ in Thousands	Common Stock Stock Issued in January	Common Stock Stock Issued in June	Common Stock	Additional Paid-In Capital Stock Issued in January	Additional Paid-In Capital Stock Issued in June	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Stock Issued in January	Stock Issued in June	Total
Beginning balance at Dec. 31, 2018			$ 2			$ 68,498	$ (563)	$ 28,355			$ 96,292
Beginning balance (in shares) at Dec. 31, 2018			17,000,000
Changes in Stockholders’ Equity
Other comprehensive income, net of tax							5,485				5,485
Distribution to stockholder								(5,120)			(5,120)
Stock-based compensation						23,267					23,267
Issuance of common stock in stock offering, net of offering cost						87,424					87,424
Issuance of common stock in stock offering, net of offering costs (in shares)			6,468,750
Net income (loss)								(7,712)			(7,712)
Ending balance at Jun. 30, 2019			$ 2			179,189	4,922	15,523			199,636
Ending balance (in shares) at Jun. 30, 2019			23,468,750
Beginning balance at Dec. 31, 2019			$ 2			180,012	4,686	33,856			$ 218,556
Beginning balance (in shares) at Dec. 31, 2019			23,468,750								23,468,750
Changes in Stockholders’ Equity
Other comprehensive income, net of tax							4,843				$ 4,843
Stock-based compensation						907					907
Issuance of common stock in stock offering, net of offering cost				$ 35,464	$ 90,224				$ 35,464	$ 90,224
Issuance of common stock in stock offering, net of offering costs (in shares)	750,000	1,150,000
Issuance of common stock via employee stock purchase plan						416					416
Issuance of common stock via employee stock purchase plan (in shares)			21,111
Issuance of common stock via equity incentive plan						1,048					1,048
Issuance of common stock via equity incentive plan (in shares)			78,460
Net income (loss)								23,785			23,785
Ending balance at Jun. 30, 2020			$ 2			$ 308,071	$ 9,529	$ 57,641			$ 375,243
Ending balance (in shares) at Jun. 30, 2020			25,468,321								25,468,321