Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ 1,505	$ (2,884)	$ (3,220)	$ (3,564)
Unrealized investment gains (losses):
Unrealized investment gains (losses) during the period	5,017	1,366	3,702	2,923
Income tax (benefit) expense	0	0	0	0
Unrealized investment gains (losses), net of tax	5,017	1,366	3,702	2,923
Less: reclassification adjustments to:
Net realized investment gains (losses) included in net income (loss)	2	30	386	(110)
Income tax (benefit) expense	0	0	0	0
Total reclassifications included in net income (loss), net of tax	2	30	386	(110)
Other comprehensive income (loss)	5,015	1,336	3,316	3,033
Total comprehensive income (loss)	$ 6,520	$ (1,548)	$ 96	$ (531)