Average Market Price of Common Stock and the Incremental Shares that were Dilutive or Potentially Dilutive (Detail) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Average market price of Real Industry common stock	$ 7.27	$ 10.63	$ 7.43	$ 9.18
Potentially dilutive common stock equivalents:
Total potentially dilutive common stock equivalents	3,122,217	0	3,122,217	2,768,613
Unvested Restricted Common Stock
Potentially dilutive common stock equivalents:
Total potentially dilutive common stock equivalents	571,676	0	571,676	264,630
Outstanding Common Stock Options
Potentially dilutive common stock equivalents:
Total potentially dilutive common stock equivalents	748,150	0	748,150	775,650
Unvested Performance Shares
Potentially dilutive common stock equivalents:
Total potentially dilutive common stock equivalents	354,058	0	354,058	260,000
Warrants
Potentially dilutive common stock equivalents:
Total potentially dilutive common stock equivalents	1,448,333	0	1,448,333	1,468,333