Net Income (Loss) Per Common Share - Schedule of Potential Dilutive Common Shares (Detail)	3 Months Ended
	Mar. 31, 2018 shares
Minimum [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Potential dilutive shares if converted to common	519,744,585
Minimum [Member] | Series A Preferred Stock [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Potential dilutive shares if converted to common	10,065,629
Minimum [Member] | Series B Redeemable Convertible Preferred Stock [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Potential dilutive shares if converted to common	444,444,444
Maximum [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Potential dilutive shares if converted to common	596,474,743
Maximum [Member] | Series A Preferred Stock [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Potential dilutive shares if converted to common	10,065,629
Maximum [Member] | Series B Redeemable Convertible Preferred Stock [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Potential dilutive shares if converted to common	444,444,444
Maximum [Member] | Series B Preferred Stock Dividends [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Potential dilutive shares if converted to common	64,285,714
Maximum [Member] | Series B Preferred Stock Acquisition Conversion Payment [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Potential dilutive shares if converted to common	11,428,572
Restricted Shares Subject to Vesting [Member] | Minimum [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Potential dilutive shares if converted to common	3,834,512
Restricted Shares Subject to Vesting [Member] | Maximum [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Potential dilutive shares if converted to common	3,834,512
Warrants Outstanding [Member] | Minimum [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Potential dilutive shares if converted to common	61,400,000
Warrants Outstanding [Member] | Maximum [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Potential dilutive shares if converted to common	61,400,000
Restricted shares to be issued if Nationstar transaction is consummated [Member] | Maximum [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Potential dilutive shares if converted to common	1,015,872