Additional Securities Transactions would have Further Diluted Calculation for Earnings (Loss) Per Share (Detail) - shares	1 Months Ended			3 Months Ended	12 Months Ended
	Mar. 31, 2017	Feb. 28, 2017	Jan. 31, 2017	Mar. 30, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Securities that could potentially dilute the calculation of diluted earnings per share					1,210,231	1,153,445	231,254
Subsequent Event
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Securities that could potentially dilute the calculation of diluted earnings per share				7,990,382
2022 Notes exchanges | Subsequent Event
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Securities that could potentially dilute the calculation of diluted earnings per share			2,155,382
Issuance of common stock | Subsequent Event
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Securities that could potentially dilute the calculation of diluted earnings per share		5,680,000
Exercise of Series L Warrants | Scenario, Forecast
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Securities that could potentially dilute the calculation of diluted earnings per share	155,000