Investments Amortized cost, gross unrealized gains and losses, and estimated fair value (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Fixed maturities, cost	$ 57,172		$ 62,136
Gross Unrealized Gain, Fixed Maturities	149		133
Gross Unrealized Loss, Fixed Maturities	356		505
Total Fixed Maturities	56,965		61,764
Equity investments, cost	16,699		19,099
Total Equity Investments	19,441		23,230
Amortized Cost	73,871		81,235
Gross Unrealized Gain	3,571		4,748
Gross Unrealized Loss	1,036		989
Estimated Fair Value, Fixed Maturities and Equity Investments	76,406		84,994
US Government Agencies Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed maturities, cost	27,033		28,312
Gross Unrealized Gain, Fixed Maturities	24		22
Gross Unrealized Loss, Fixed Maturities	153		186
Total Fixed Maturities	26,904		28,148
Gross Unrealized Loss		$ 153	186
US States and Political Subdivisions Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed maturities, cost	3,722		3,131
Gross Unrealized Gain, Fixed Maturities	9		1
Gross Unrealized Loss, Fixed Maturities	37		44
Total Fixed Maturities	3,694		3,088
Gross Unrealized Loss		37	44
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed maturities, cost	8,419		8,610
Gross Unrealized Gain, Fixed Maturities	14		12
Gross Unrealized Loss, Fixed Maturities	80		116
Total Fixed Maturities	8,353		8,506
Gross Unrealized Loss		80	116
Asset-backed Securities, Securitized Loans and Receivables [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed maturities, cost	2,197		3,468
Gross Unrealized Gain, Fixed Maturities	4		4
Gross Unrealized Loss, Fixed Maturities	6		5
Total Fixed Maturities	2,195		3,467
Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed maturities, cost	15,801		18,615
Gross Unrealized Gain, Fixed Maturities	98		94
Gross Unrealized Loss, Fixed Maturities	80		154
Total Fixed Maturities	15,819		18,555
Gross Unrealized Loss		80	154
Common Stock [Member]
Schedule of Available-for-sale Securities [Line Items]
Equity investments, cost	15,222		17,701
Total Equity Investments	17,616		21,426
Unrealized Gain, Equity Investments	2,996		4,156
Gross Unrealized Loss, Equity Investments	602		431
Gross Unrealized Loss		602	431
Warrant [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross Unrealized Loss		78	53
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Equity investments, cost	16,699		19,099
Total Equity Investments	19,441		23,230
Unrealized Gain, Equity Investments	3,422		4,615
Gross Unrealized Loss, Equity Investments	680		484
Gross Unrealized Loss		$ 680	484
Fair Value, Inputs, Level 1 [Member]
Schedule of Available-for-sale Securities [Line Items]
Total Fixed Maturities	0		0
Total Equity Investments	18,254		22,090
Fair Value, Inputs, Level 1 [Member] | US States and Political Subdivisions Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Total Fixed Maturities	0		0
Fair Value, Inputs, Level 1 [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Schedule of Available-for-sale Securities [Line Items]
Total Fixed Maturities	0		0
Fair Value, Inputs, Level 1 [Member] | Asset-backed Securities, Securitized Loans and Receivables [Member]
Schedule of Available-for-sale Securities [Line Items]
Total Fixed Maturities			0
Fair Value, Inputs, Level 1 [Member] | Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Total Fixed Maturities	0		0
Fair Value, Inputs, Level 1 [Member] | Warrant [Member]
Schedule of Available-for-sale Securities [Line Items]
Equity investments, cost	517		438
Total Equity Investments	638		664
Unrealized Gain, Equity Investments	199		279
Gross Unrealized Loss, Equity Investments	78		53
Fair Value, Inputs, Level 2 [Member]
Schedule of Available-for-sale Securities [Line Items]
Total Fixed Maturities	56,965		61,764
Total Equity Investments	1,187		1,140
Fair Value, Inputs, Level 2 [Member] | US Government Agencies Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Total Fixed Maturities			28,148
Estimated Fair Value, Fixed Maturities and Equity Investments	26,904
Fair Value, Inputs, Level 2 [Member] | US States and Political Subdivisions Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Total Fixed Maturities			3,088
Estimated Fair Value, Fixed Maturities and Equity Investments	3,694
Fair Value, Inputs, Level 2 [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Schedule of Available-for-sale Securities [Line Items]
Total Fixed Maturities			8,506
Estimated Fair Value, Fixed Maturities and Equity Investments	8,353
Fair Value, Inputs, Level 2 [Member] | Asset-backed Securities, Securitized Loans and Receivables [Member]
Schedule of Available-for-sale Securities [Line Items]
Total Fixed Maturities			3,467
Estimated Fair Value, Fixed Maturities and Equity Investments	2,195
Fair Value, Inputs, Level 2 [Member] | Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Total Fixed Maturities			18,555
Estimated Fair Value, Fixed Maturities and Equity Investments	15,819
Fair Value, Inputs, Level 2 [Member] | Warrant [Member]
Schedule of Available-for-sale Securities [Line Items]
Equity investments, cost	960		960
Total Equity Investments	1,187		1,140
Unrealized Gain, Equity Investments	227		180
Gross Unrealized Loss, Equity Investments	$ 0		$ 0