Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ (1,209)	$ 541	$ (293)	$ (2,679)
Unrealized investment gains (losses):
Unrealized investment gains (losses) during the period	(570)	(1,085)	(2,100)	2,617
Income tax (benefit) expense	0	0	0	0
Unrealized investment gains (losses), net of tax	(570)	(1,085)	(2,100)	2,617
Less: reclassification adjustments to:
Net realized investment gains (losses) included in net income (loss)	44	292	85	678
Income tax (benefit) expense	0	0	0	0
Total reclassifications included in net income (loss), net of tax	44	292	85	678
Other comprehensive income (loss)	(614)	(1,377)	(2,185)	1,939
Total comprehensive income (loss)	$ (1,823)	$ (836)	$ (2,478)	$ (740)