5. Inventory

Inventory is comprised of the following:

	September 30, 2015			March 31, 2015
Non-core inventory
Raw materials	$	17,407,000		$	18,836,000
Work-in-process		557,000			255,000
Finished goods		38,200,000			39,828,000
		56,164,000			58,919,000
Less allowance for excess and obsolete inventory		(2,191,000	)		(2,090,000	)
Total	$	53,973,000		$	56,829,000

Inventory unreturned	$	10,641,000		$	7,833,000
Long-term core inventory
Used cores held at the Company's facilities	$	38,044,000		$	27,417,000
Used cores expected to be returned by customers		10,382,000			9,799,000
Remanufactured cores held in finished goods		19,881,000			21,557,000
Remanufactured cores held at customers' locations (1)		164,313,000			130,762,000
		232,620,000			189,535,000
Less allowance for excess and obsolete inventory		(1,238,000	)		(585,000	)
Total	$	231,382,000		$	188,950,000

Long-term core inventory deposits (1)	$	5,569,000		$	31,571,000

(1)

During the three months ended September 30, 2015, the Company completed the core buy-back program with one of its largest customers. As a result of the completion of this buy-back program and related long-term core inventory reconciliations, $25,805,000 from the long-term core inventory deposits account was transferred to the remanufactured cores held at customers’ locations account within long-term core inventory. At March 31, 2015, $26,002,000 of remanufactured cores in connection with this core buy-back program was included in long-term core inventory deposits.