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Accounts Receivable (Tables) | 12 Months Ended
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Jul. 29, 2017
Receivables [Abstract] |
Schedule of Accounts Receivable | The Company maintains an allowance for doubtful accounts for estimated losses on uncollected balances. The allowance for doubtful accounts changed as follows (dollars in thousands):
| Fiscal Year Ended
| 2017 |  | 2016
Allowance for doubtful accounts at beginning of period | $ | 1,603 |  |  | $ | 1,216 |
Bad debt expense | 199 |  |  | 1,252 |
Amounts charged against the allowance | (967 | ) |  | (865 | )
Allowance for doubtful accounts at end of period | $ | 835 |  |  | $ | 1,603 |
Accounts receivable consisted of the following (dollars in thousands):
| July 29, 2017 |  | July 30, 2016
Contract billings | $ | 348,990 |  |  | $ | 297,532 |
Retainage | 21,645 |  |  | 32,101 |
Total | 370,635 |  |  | 329,633 |
Less: allowance for doubtful accounts | (835 | ) |  | (1,603 | )
Accounts receivable, net | $ | 369,800 |  |  | $ | 328,030 |

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- Definition Tabular disclosure of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3,4) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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