Annual report pursuant to Section 13 and 15(d)

Contracts in Progress (Details Textual)

v3.8.0.1
Contracts in Progress (Details Textual) - USD ($)
$ in Millions
Dec. 31, 2017
Dec. 31, 2016
Subcontract Payable Retainage $ 11.1 $ 8.9
Net Amount Of Unresolved Change Orders And Claims $ 10.3 $ 7.9