Subsequent Events - Schedule of Consolidated Pro Forma Balance Sheets (Detail) (USD $)	Dec. 31, 2014		Dec. 31, 2013	Dec. 31, 2012	Mar. 19, 2012	Dec. 31, 2011
Investments held in trust, at fair value:
Fixed-maturity securities	$ 52,578,000		$ 145,904,000
Cash equivalents held in trust	11,122,000		33,093,000
Total investments held in trust	63,700,000		178,997,000
Cash and cash equivalents	78,009,000		11,986,000
Fixed-maturity securities, at fair value	8,063,000		72,897,000
Restricted cash	2,447,000		115,000
Accrued investment income	476,000		1,110,000
Deferred offering costs	2,568,000		1,071,000
Other assets	876,000		1,462,000
Total assets	156,139,000		267,638,000
Liabilities:
Notes payable - principal	31,220,000		105,502,000
Notes payable - interest	338,000		1,143,000
Losses and loss adjustment reserves	18,947,000		44,314,000	82,524,000		142,119,000
Losses payable	696,000		2,517,000
Unearned premiums	1,094,000		1,394,000
Accrued ceding commissions	44,000		102,000
Loss contract fair market value reserve	12,549,000		46,319,000		63,100,000
Other liabilities	3,021,000		1,218,000
Total liabilities	67,909,000		202,509,000
Commitments and contingencies
Shareholders’ equity:
Purchase price of convertible preferred stock maximum limit
Common stock, $0.00001 par value; 500,000,000 authorized; 202,343,245 and 201,842,351 shares issued and outstanding as of December 31, 2014 and December 31, 2013, respectively	2,000		2,000
Additional paid-in capital	106,628,000		77,142,000		76,598,000
Accumulated (deficit)	(18,400,000)		(12,015,000)
Total shareholders’ equity	88,230,000		65,129,000
Total liabilities and shareholders’ equity	156,139,000		267,638,000
Preferred Series B Adjustments [Member]
Investments held in trust, at fair value:
Restricted cash	598,500,000	[1]
Deferred offering costs	(2,568,000)	[2]
Total assets	595,932,000
Liabilities:
Derivative liability - embedded conversion feature	66,227,000	[3]
Other liabilities	28,250,000	[4]
Total liabilities	94,477,000
Commitments and contingencies
Redeemable and convertible Series B preferred stock, 600,000 shares issued and outstanding	501,455,000	[5]
Shareholders’ equity:
Total liabilities and shareholders’ equity	595,932,000
Pro Forma
Investments held in trust, at fair value:
Fixed-maturity securities	52,578,000
Cash equivalents held in trust	11,122,000
Total investments held in trust	63,700,000
Cash and cash equivalents	78,009,000
Fixed-maturity securities, at fair value	8,063,000
Restricted cash	600,947,000
Accrued investment income	476,000
Other assets	876,000
Total assets	752,071,000
Liabilities:
Notes payable - principal	31,220,000
Notes payable - interest	338,000
Losses and loss adjustment reserves	18,947,000
Losses payable	696,000
Unearned premiums	1,094,000
Accrued ceding commissions	44,000
Loss contract fair market value reserve	12,549,000
Derivative liability - embedded conversion feature	66,227,000
Other liabilities	31,271,000
Total liabilities	162,386,000
Commitments and contingencies
Redeemable and convertible Series B preferred stock, 600,000 shares issued and outstanding	501,455,000
Shareholders’ equity:
Common stock, $0.00001 par value; 500,000,000 authorized; 202,343,245 and 201,842,351 shares issued and outstanding as of December 31, 2014 and December 31, 2013, respectively	2,000
Additional paid-in capital	106,628,000
Accumulated (deficit)	(18,400,000)
Total shareholders’ equity	88,230,000
Total liabilities and shareholders’ equity	752,071,000
Series A [Member]
Shareholders’ equity:
Purchase price of convertible preferred stock maximum limit
Series A [Member] | Preferred Series B Adjustments [Member]
Shareholders’ equity:
Purchase price of convertible preferred stock maximum limit
Series A [Member] | Pro Forma
Shareholders’ equity:
Purchase price of convertible preferred stock maximum limit
Series B [Member]
Shareholders’ equity:
Purchase price of convertible preferred stock maximum limit
Series B [Member] | Preferred Series B Adjustments [Member]
Shareholders’ equity:
Purchase price of convertible preferred stock maximum limit
Series B [Member] | Pro Forma
Shareholders’ equity:
Purchase price of convertible preferred stock maximum limit

[1] This adjustment is necessary to give effect to the cash deposited into the Escrow account representing the proceeds of the Offering less offering fees payable on the Issue Date but before payment of other offering fees and expenses, some of which are dependent on future events.

[2] This adjustments is necessary to properly net the deferred offering costs recorded at December 31, 2014 as a reduction of the net mezzanine liability as of the Issue Date.

[3] This adjustment reflects the valuation of the embedded derivative created by the variable conversion feature of the Series B Offering.

[4] This adjustment reflects the current estimate of additional offering fees and expenses, some of which are dependent on future events.

[5] This adjustment reflects the net Series B preferred shares after deducting paid and contingent offering expenses and the value of the embedded derivative described above.