Investments (Tables)

3 Months Ended

12 Months Ended

Mar. 31, 2019

Dec. 31, 2018

Schedule of Held-to-maturity Securities [Line Items]

Schedule of Unrealized Loss on Investments [Table Text Block]

he following table shows the investments’ gross unrealized loss and fair value, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position as of March 31, 2019:

	Less than 12 Months				12 Months or More					Total
(in thousands)	Fair value		Unrealized losses		Fair value		Unrealized losses			Fair value		Unrealized losses
U.S. Treasury securities, obligations of U.S. Government agencies and Municipalities	$	—	$	—	$	11,456	$	(134	)	$	11,456	$	(134	)
Total	$	—	$	—	$	11,456	$	(134	)	$	11,456	$	(134	)

December 31, 2018:

	Less than 12 Months					12 Months or More					Total
(in thousands)	Fair value		Unrealized losses			Fair value		Unrealized losses			Fair value		Unrealized losses
U.S. Treasury securities, obligations of U.S. Government agencies and Municipalities	$	5,866	$	(6	)	$	12,634	$	(216	)	$	18,500	$	(222	)
Corporate debt	457		—			100		—			557		—
Total	$	6,323	$	(6	)	$	12,734	$	(216	)	$	19,057	$	(222	)

Schedule of Available-for-sale Securities Reconciliation [Table Text Block]

At March 31, 2019, the Company’s amortized cost and fair values of fixed maturity securities are summarized as follows: 

(in thousands)	Cost		Gross unrealized gains		Gross unrealized losses			Fair value
U.S. Treasury securities, obligations of U.S. Government agencies and Municipalities	$	20,241	$	51	$	(134	)	$	20,158
Corporate debt	233		6		—			239
Total	$	20,474	$	57	$	(134	)	$	20,397

At December 31, 2018, the Company’s amortized cost and fair values of fixed maturity securities are summarized as follows:

(in thousands)	Cost		Gross unrealized gains		Gross unrealized losses			Fair value
U.S. Treasury securities, obligations of U.S. Government agencies and Municipalities	$	21,729	$	7	$	(222	)	$	21,514
Corporate debt	623		—		—			623
Total	$	22,352	$	7	$	(222	)	$	22,137

Amortized Cost and Fair Value of Fixed Maturity Securities by Contractual Maturity

The amortized cost and estimated fair value of the fixed maturity securities at March 31, 2019 by contractual maturity are set forth below:

(in thousands)	Amortized cost		Fair value
Years to maturity:
Due in one year or less	$	2,880	$	2,868
Due after one year through five years	17,594		17,529
Due after five years	—		—
Total	$	20,474	$	20,397

The amortized cost and estimated fair value of the fixed maturity securities at December 31, 2018 by contractual maturity are set forth below:

(in thousands)	Amortized cost		Fair value
Years to maturity:
Due in one year or less	$	4,768	$	4,743
Due after one year through five years	17,584		17,394
Due after five years	—		—
Total	$	22,352	$	22,137