Investments - Schedule of Investments in Fixed Maturity Securities (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Cost	$ 18,094	$ 19,821
Gross Unrealized Gains	40	53
Gross Unrealized Losses	(42)	(12)
Fair Value	18,092	19,862
U.S. Treasury securities, obligations of U.S. Government agencies and Municipals
Schedule of Available-for-sale Securities [Line Items]
Cost	11,876	10,774
Gross Unrealized Gains	6	7
Gross Unrealized Losses	(26)	(1)
Fair Value	11,856	10,780
Foreign government
Schedule of Available-for-sale Securities [Line Items]
Cost	50	50
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	50	50
Corporate debt
Schedule of Available-for-sale Securities [Line Items]
Cost	4,505	5,854
Gross Unrealized Gains	7	9
Gross Unrealized Losses	(16)	(11)
Fair Value	4,496	5,852
Short duration fixed income fund
Schedule of Available-for-sale Securities [Line Items]
Cost	1,663	3,143
Gross Unrealized Gains	27	37
Gross Unrealized Losses	0
Fair Value	$ 1,690	$ 3,180