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Balance Sheet Details | 3 Months Ended
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Sep. 30, 2018
Balance Sheet Details |
Balance Sheet Details | 3. Balance Sheet Details The following tables provide details of selected balance sheet accounts (in thousands):
|  | June 30, |  | September 30,
|  | 2018 |  | 2018
Accounts receivable |  | $ | 221,240 |  | $ | 233,778
Less allowance for doubtful accounts |  |  | (10,496) |  |  | (11,608)
Total |  | $ | 210,744 |  | $ | 222,170
|  | June 30, |  | September 30,
|  | 2018 |  | 2018
Raw materials |  | $ | 156,612 |  | $ | 168,807
Work-in-process |  |  | 89,468 |  |  | 89,095
Finished goods |  |  | 67,472 |  |  | 86,072
Total |  | $ | 313,552 |  | $ | 343,974
|  | June 30, |  | September 30,
|  | 2018 |  | 2018
Land |  | $ | 16,569 |  | $ | 16,569
Buildings, civil works and improvements |  |  | 56,585 |  |  | 56,533
Leasehold improvements |  |  | 9,681 |  |  | 9,772
Equipment and tooling |  |  | 117,294 |  |  | 123,317
Furniture and fixtures |  |  | 3,331 |  |  | 3,341
Computer equipment |  |  | 18,759 |  |  | 19,229
Computer software |  |  | 19,509 |  |  | 19,665
Computer software implementation in process |  |  | 4,318 |  |  | 5,256
Construction in process |  |  | 790 |  |  | 1,203
Total |  |  | 246,836 |  |  | 254,885
Less accumulated depreciation and amortization |  |  | (131,312) |  |  | (135,121)
Property and equipment, net |  | $ | 115,524 |  | $ | 119,764
Depreciation expense was $16.2 million and $5.1 million for the three months ended September 30, 2017 and 2018, respectively. The decrease in depreciation is primarily related to a transfer of assets. In January 2018, we entered into a two-year agreement with the Mexican government to continue providing security screening services. Upon inception of the contract, we transferred certain fixed assets with a net book value of $29.5 million to the customer, and this remaining cost to obtain the contract is amortized on a straightline basis over the term of the contract as corresponding revenues are recognized. During the three months ended September 30, 2018, we recognized $3.7 million of amortization expense related to such assets. As of September 30, 2018, $14.7 million and $4.2 million are recorded within Prepaid expenses and other current assets and Other assets, respectively.

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- Definition The entire disclosure for supplemental balance sheet disclosures, including descriptions and amounts for assets, liabilities, and equity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -URI http://asc.fasb.org/topic&trid=2122208 + Details
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