Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 213	$ (1,798)
Unrealized investment gains (losses):
Unrealized investment gains (losses) during the period	(1,846)	385
Income tax expense (benefit)	0	0
Unrealized investment gains (losses), net of tax	(1,846)	385
Less: reclassification adjustments to:
Net realized investment gains (losses) included in net income (loss)	0	51
Income tax expense (benefit)	0	0
Total reclassifications included in net income (loss), net of tax	0	51
Other comprehensive income (loss)	(1,846)	334
Total comprehensive income (loss)	$ (1,633)	$ (1,464)