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Balance Sheet Details | 6 Months Ended
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Dec. 31, 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, |  | December 31,
|  | 2018 |  | 2018
Accounts receivable |  | $ | 225,336 |  | $ | 240,749
Less allowance for doubtful accounts |  |  | (14,592) |  |  | (14,663)
Total |  | $ | 210,744 |  | $ | 226,086
|  | June 30, |  | December 31,
|  | 2018 |  | 2018
Raw materials |  | $ | 156,612 |  | $ | 153,195
Work-in-process |  |  | 89,468 |  |  | 86,582
Finished goods |  |  | 67,472 |  |  | 75,423
Total |  | $ | 313,552 |  | $ | 315,200
|  | June 30, |  | December 31,
|  | 2018 |  | 2018
Land |  | $ | 16,569 |  | $ | 16,555
Buildings, civil works and improvements |  |  | 56,585 |  |  | 55,083
Leasehold improvements |  |  | 9,681 |  |  | 10,144
Equipment and tooling |  |  | 117,294 |  |  | 125,099
Furniture and fixtures |  |  | 3,331 |  |  | 3,175
Computer equipment |  |  | 18,759 |  |  | 17,863
Computer software |  |  | 19,509 |  |  | 19,555
Computer software implementation in process |  |  | 4,318 |  |  | 6,640
Construction in process |  |  | 790 |  |  | 2,428
Total |  |  | 246,836 |  |  | 256,542
Less accumulated depreciation and amortization |  |  | (131,312) |  |  | (135,272)
Property and equipment, net |  | $ | 115,524 |  | $ | 121,270
Depreciation expense was $16.8 million and $5.2 million for the three months ended December 31, 2017 and 2018, respectively, and approximately $33.0 million and $10.3 million for the six months ended December 31, 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 and six months ended December 31, 2018, we recognized $3.7 million and $7.1 million, respectively, of amortization expense related to such assets. As of December 31, 2018, $13.7 million and $0.5 million, respectively, are recorded within Prepaid expenses and other current assets and Other assets.

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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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