7. Inventory

Non-core inventory, inventory unreturned, long-term core inventory, and long-term core inventory deposits are as follows at March 31:

	2015			2014
Non-core inventory
Raw materials	$	18,836,000		$	18,787,000
Work-in-process		255,000			124,000
Finished goods		39,828,000			30,197,000
		58,919,000			49,108,000
Less allowance for excess and obsolete inventory		(2,090,000	)		(1,862,000	)

Total	$	56,829,000		$	47,246,000

Inventory unreturned	$	7,833,000		$	7,534,000
Long-term core inventory
Used cores held at the Company's facilities	$	27,417,000		$	23,718,000
Used cores expected to be returned by customers		9,799,000			6,160,000
Remanufactured cores held in finished goods		21,557,000			18,093,000
Remanufactured cores held at customers' locations		130,762,000			96,351,000
		189,535,000			144,322,000
Less allowance for excess and obsolete inventory		(585,000	)		(846,000	)

Total	$	188,950,000		$	143,476,000

Long-term core inventory deposits	$	31,571,000		$	29,375,000