Other Balance Sheet Information

The following is a summary of accounts receivable at June 30, 2016 and September 30, 2015 (in thousands):



	June 30, 2016			September 30, 2015
Accounts receivable	$	103,396		$	87,582
Less: allowance for doubtful accounts	(2,200		)	(1,019		)
Less: allowance for sales returns	(105		)	(115		)
Accounts receivable, net	$	101,091		$	86,448

The following is a summary of inventories at June 30, 2016 and September 30, 2015 (in thousands):



	June 30, 2016		September 30, 2015
Inventories:
Raw materials and purchased parts	$	60,883	$	62,441
Work-in-process	16,488		21,563
Finished goods	20,786		16,615
Total inventories	$	98,157	$	100,619

Reserves for excess and obsolete inventory were $24.9 million and $23.8 million at June 30, 2016 and September 30, 2015, respectively.

As of June 30, 2016 and September 30, 2015, the building and the underlying land located in Oberdiessbach, Switzerland were presented at fair value of $2.8 million and $2.9 million, respectively, as "Assets Held for Sale" in the accompanying unaudited Consolidated Balance Sheets. The Company determined the fair value of the assets held for sale based on indication of value resulting from marketing the building and the land to prospective buyers. Please refer to Note 18, "Fair Value Measurements" for further information on such measurements. During the three months ended June 30, 2016, the Company entered into a binding agreement with an unrelated third party to sell both the building and the underlying land in Oberdiessbach, Switzerland for a total price of $2.8 million and remeasured the fair value of the assets held for sale. The corresponding impact of this remeasurement on the Company's results of operations during the three and nine months ended June 30, 2016 was insignificant. The sale was completed on July 1, 2016.

The Company establishes reserves for estimated cost of product warranties based on historical information. Product warranty reserves are recorded at the time product revenue is recognized, and retrofit accruals are recorded at the time retrofit programs are established. The Company’s warranty obligation is affected by product failure rates, utilization levels, material usage, service delivery costs incurred in correcting a product failure and supplier warranties on parts delivered to the Company.

The following is a summary of product warranty and retrofit activity on a gross basis for the three and nine months ended June 30, 2016 and 2015 (in thousands):



Activity - Three Months Ended June 30, 2016
Balance at March 31, 2016		Accruals		Costs Incurred			Balance at June 30, 2016
$	5,735	$	2,279	$	(2,059	)	$	5,955



Activity - Three Months Ended June 30, 2015
Balance at March 31, 2015		Accruals		Costs Incurred			Balance at June 30, 2015
$	6,203	$	2,725	$	(2,744	)	$	6,184



Activity - Nine Months Ended June 30, 2016
Balance at September 30, 2015		Accruals		Costs Incurred			Balance at June 30, 2016
$	6,089	$	6,989	$	(7,123	)	$	5,955



Activity - Nine Months Ended June 30, 2015
Balance at September 30, 2014		Adjustments for Acquisitions and Divestitures		Accruals		Costs Incurred			Balance at June 30, 2015
$	6,499	$	81	$	7,870	$	(8,266	)	$	6,184