Average Market Price of Common Stock and the Incremental Shares that were Dilutive or Potentially Dilutive (Detail) - $ / shares	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Average market price of Real Industry common stock	$ 6.86	$ 7.22
Potentially dilutive common stock equivalents:
Total potentially dilutive common stock equivalents	3,117,092	2,641,502
Unvested Restricted Common Stock
Potentially dilutive common stock equivalents:
Total potentially dilutive common stock equivalents	491,286	275,852
Common Stock Options
Potentially dilutive common stock equivalents:
Total potentially dilutive common stock equivalents	775,650	865,650
Unvested Performance Shares
Potentially dilutive common stock equivalents:
Total potentially dilutive common stock equivalents	381,823
Warrants
Potentially dilutive common stock equivalents:
Total potentially dilutive common stock equivalents	1,468,333	1,500,000