5. Inventory

Inventory is comprised of the following:

	December 31, 2013			March 31, 2013
Non-core inventory
Raw materials	$	14,985,000		$	14,152,000
Work-in-process		94,000			137,000
Finished goods		29,845,000			19,239,000
		44,924,000			33,528,000
Less allowance for excess and obsolete inventory		(1,704,000	)		(1,690,000	)

Total	$	43,220,000		$	31,838,000

Inventory unreturned	$	7,199,000		$	6,981,000
Long-term core inventory
Used cores held at the Company's facilities	$	24,460,000		$	22,227,000
Used cores expected to be returned by customers		7,075,000			5,147,000
Remanufactured cores held in finished goods		16,965,000			15,019,000
Remanufactured cores held at customers' locations		87,138,000			76,626,000
		135,638,000			119,019,000
Less allowance for excess and obsolete inventory		(1,121,000	)		(808,000	)
Total	$	134,517,000		$	118,211,000

Long-term core inventory deposits	$	28,857,000		$	27,610,000

As of May 31, 2013, $25,731,000 of non-core inventory, $5,321,000 of inventory unreturned, and $40,471,000 of long-term core inventory at the discontinued subsidiary was deconsolidated from the consolidated financial statements of the Company (see Note 2).