INCOME TAXES - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Line Items]
Federal income tax benefits		$ 52.8
Federal NOLs		$ 155.2
U.S. statutory tax rate		34.00%
State income tax benefits		$ 2.0
Federal Research and Development
Income Tax Disclosure [Line Items]
Research and development tax credits		1.2
Research and development expiration period	which expire in the years 2024 through 2034
Indiana State Research and Development
Income Tax Disclosure [Line Items]
Research and development tax credits		$ 0.2
Research and development expiration period	which expire in the years 2016 and 2017
Maximum
Income Tax Disclosure [Line Items]
NOL expiration year		2035
Minimum
Income Tax Disclosure [Line Items]
NOL expiration year		2016