Related-Party Transactions (Detail) - USD ($)		9 Months Ended	12 Months Ended			24 Months Ended	36 Months Ended
	Oct. 07, 2013	Oct. 06, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2015	Dec. 31, 2015
Related party balances and activity
Accounts payable to affiliates			$ 66,000	$ 1,114,000		$ 66,000	$ 66,000
Accounts receivable from affiliates				231,000
Advertising funds
Related party balances and activity
Related party transaction expense - S,G and A			917,000	1,152,000	$ 1,148,000
Tails Inc.
Related party balances and activity
Related party transaction expense - S,G and A		$ 244,000
Accounts payable to affiliates				1,031,000
HBN and Tails
Related party balances and activity
Revenue from related parties		$ 2,648,000
RIHI
Related party balances and activity
Related party transaction expense - S,G and A							0
Other affiliates
Related party balances and activity
Accounts payable to affiliates			66,000	83,000		66,000	66,000
Accounts receivable from affiliates				(15,000)
Other affiliates | Services rendered and rent for office space provided
Related party balances and activity
Amounts allocated for services rendered and rent for office space			$ 1,720,000	$ 2,186,000	3,064,000
General payment period			30 days
Accounts receivable from affiliates			$ 0			0	$ 0
Perella Weinberg
Related party balances and activity
Related party transaction expense						$ 0
Perella Weinberg | IPO
Related party balances and activity
Related party transaction expense	$ 632,500				$ 848,500