Accumulated Other Comprehensive Income (Loss) - Schedule of AOCI (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
AOCI, before tax
Beginning balance	$ 203,376	$ 269,502	$ 125,419
Ending balance	133,767	203,376	269,502
Estimated tax benefit (provision)
Beginning balance, tax	0	0	0
Other comprehensive income (loss) before reclassifications, tax	0	0	0
Less: Amount reclassified from accumulated other comprehensive income (loss), tax	0	0	0
Net current period after comprehensive income (loss), tax	0	0	0
Ending balance, tax	0	0	0
Total
Beginning balance	203,376	269,502	125,419
Other comprehensive income (loss) before reclassifications	(18)	300	274
Less: Amount reclassified from accumulated other comprehensive income (loss)	(23)	302	274
Total other comprehensive income (loss), net of tax	5	(2)	0
Ending balance	133,767	203,376	269,502
Unrealized gains (losses) on available-for-sale securities
AOCI, before tax
Beginning balance	23	(2)	0
Other comprehensive income (loss) before reclassifications	(22)	25	(2)
Less: Amount reclassified from accumulated other comprehensive income (loss)	0	0	0
Total other comprehensive income (loss), before tax	(22)	25	(2)
Ending balance	1	23	(2)
Total
Beginning balance	23	(2)	0
Ending balance	1	23	(2)
Gains (losses) on cash flow hedge
AOCI, before tax
Beginning balance	(25)	2	0
Other comprehensive income (loss) before reclassifications	4	275	276
Less: Amount reclassified from accumulated other comprehensive income (loss)	(23)	302	274
Total other comprehensive income (loss), before tax	27	(27)	2
Ending balance	2	(25)	2
Total
Beginning balance	(25)	2	0
Ending balance	2	(25)	2
Total
AOCI, before tax
Beginning balance	(2)	0	0
Ending balance	3	(2)	0
Total
Beginning balance	(2)	0	0
Ending balance	$ 3	$ (2)	$ 0