Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Total fixed income securities	$ 45,207	$ 26,559
Total equity securities	1,771	1,136
Total fixed income and equity securities	46,978	27,695
U.S. government [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Total fixed income securities	2,899	1,604
States, Municipalities and Political Subdivisions [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Total fixed income securities	5,365	2,246
Asset-backed Securities and Collateralized Mortgage Backed Obligations [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Total fixed income securities	16,635	11,968
Corporate [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Total fixed income securities	20,308	10,741
Level 1 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Total equity securities	1,771	1,136
Total fixed income and equity securities	1,771	1,136
Level 2 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Total fixed income securities	45,207	26,559
Total fixed income and equity securities	45,207	26,559
Level 2 [Member] | U.S. government [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Total fixed income securities	2,899	1,604
Level 2 [Member] | States, Municipalities and Political Subdivisions [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Total fixed income securities	5,365	2,246
Level 2 [Member] | Asset-backed Securities and Collateralized Mortgage Backed Obligations [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Total fixed income securities	16,635	11,968
Level 2 [Member] | Corporate [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Total fixed income securities	20,308	10,741
Common Stock [Member] | Level 1 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Total equity securities	1,612	1,136
Common Stock [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Total equity securities	1,612	$ 1,136
Warrants to Purchase Common Stock [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Total equity securities	122
Warrants to Purchase Common Stock [Member] | Level 1 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Total equity securities	122
Rights to Purchase Common Stock [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Total equity securities	37
Rights to Purchase Common Stock [Member] | Level 1 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Total equity securities	$ 37