Average Market Price of Common Stock and the Incremental Shares that were Dilutive or Potentially Dilutive (Detail) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Average market price of Real Industry common stock	$ 8.12	$ 9.63	$ 7.51	$ 8.44
Potentially dilutive common stock equivalents:
Total potentially dilutive common stock equivalents	3,097,092	2,825,280	3,097,092	2,825,280
Unvested Restricted Common Stock
Potentially dilutive common stock equivalents:
Total potentially dilutive common stock equivalents	491,286	264,630	491,286	264,630
Common Stock Options
Potentially dilutive common stock equivalents:
Total potentially dilutive common stock equivalents	775,650	815,650	775,650	815,650
Unvested Performance Shares
Potentially dilutive common stock equivalents:
Total potentially dilutive common stock equivalents	381,823	260,000	381,823	260,000
Warrants
Potentially dilutive common stock equivalents:
Total potentially dilutive common stock equivalents	1,448,333	1,485,000	1,448,333	1,485,000