Quarterly report pursuant to Section 13 or 15(d)

Additional Cash Flow Information - Supplemental Disclosure of Cash Flow Information (Detail)

v3.7.0.1
Additional Cash Flow Information - Supplemental Disclosure of Cash Flow Information (Detail) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Additional Cash Flow Elements and Supplemental Cash Flow Information [Abstract]    
Property, plant and equipment non-cash accruals $ 217 $ 128
Land acquisition non-cash accruals   1,000
Equity offering cost accrual   $ 483