- Costs Net of Billings By Balance Sheet Location (Details) - USD ($) $ in Thousands	Feb. 28, 2018	Feb. 28, 2017
Contractors [Abstract]
Cost and estimated earnings in excess of billings on uncompleted contracts	$ 51,787	$ 50,262
Billings in excess of costs and estimated earnings on uncompleted contracts	(22,698)	(20,617)
Billings in Excess of Cost, Noncurrent	8,771	0
Total costs net of billings	$ 20,318	$ 29,645