Following are the components of selected items from the Consolidated Balance Sheets:




	April 30, 2014			January 31, 2014			April 30, 2013
Accounts receivable, net:
Trade accounts	$	55,574		$	54,962		$	59,443
Allowance for doubtful accounts	(319		)	(319		)	(205		)
	$	55,255		$	54,643		$	59,238
Inventories:
Finished goods	$	6,995		$	7,232		$	8,533
In process	1,822			2,131			2,673
Materials	46,249			45,502			37,825
	$	55,066		$	54,865		$	49,031
Property, plant and equipment, net:
Property, plant and equipment	$	184,861		$	182,700		$	164,180
Accumulated depreciation	(88,116		)	(84,624		)	(78,081		)
	$	96,745		$	98,076		$	86,099
Accrued liabilities:
Salaries and benefits	$	2,446		$	1,858		$	2,814
Vacation	3,981			3,700			4,384
401(k) contributions	353			727			319
Insurance obligations	2,359			2,428			2,458
Warranties	2,654			2,525			1,990
Acquisition-related contingent liabilities	628			890			845
Taxes - accrued and withheld	6,735			1,743			7,774
Other	1,495			2,377			1,148
	$	20,651		$	16,248		$	21,732
Other liabilities:
Postretirement benefits	$	8,068		$	7,998		$	8,120
Acquisition-related contingent consideration	2,056			2,457			2,076
Deferred income taxes	2,531			3,526			2,475
Uncertain tax positions	6,744			6,557			6,116
	$	19,399		$	20,538		$	18,787