Costs and estimated earnings on uncompleted contracts Costs and estimated earnings on uncompleted contracts (Tables)

12 Months Ended

Jan. 31, 2017

Costs and estimated earnings on uncompleted contracts [Abstract]

Costs and estimated earnings on uncompleted contracts [Table Text Block]

	2016	2015
Costs incurred on uncompleted contracts	$82,280	$78,843
Estimated earnings	51,546	46,359
Earned revenue	133,826	125,202
Less billings to date	132,835	123,915
Costs in excess of billings, net	$991	$1,287
Balance sheet classification
Costs and estimated earnings in excess of billings on uncompleted contracts	$2,091	$2,463
Billings in excess of costs and estimated earnings on uncompleted contracts	(1,100)	(1,176)
Costs in excess of billings, net	$991	$1,287