Quarterly report pursuant to Section 13 or 15(d)

Property, Plant, and Equipment - Additional Information (Detail)

v3.7.0.1
Property, Plant, and Equipment - Additional Information (Detail) - USD ($)
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Property Plant And Equipment [Line Items]    
Depreciation and amortization expenses $ 290,000 $ 198,000
Assets Held Under Capital Lease    
Property Plant And Equipment [Line Items]    
Capital leased assets, Gross 378,000  
Accumulated depreciation related to assets held under capital lease $ 264,000