Receivables - Receivables (Detail) - USD ($)	Dec. 31, 2015	Dec. 31, 2014
Receivables [Abstract]
Trade receivables	$ 31,367,000	$ 34,025,000
Less: allowance for doubtful accounts	(294,000)	(281,000)
Trade receivables, net	31,073,000	33,744,000
Recoverable income taxes	983,000	81,000
Other	414,000	141,000
Receivables, net	$ 32,470,000	$ 33,966,000