Commitments and Contingencies - Additional Information (Detail) - USD ($) |
6 Months Ended | |
|---|---|---|
Jun. 27, 2015 |
Dec. 27, 2014 |
|
| Other Commitments [Line Items] | ||
| Amount for which the Company is contingently liable under repurchase agreements | $ 7,990,000 | |
| Accrued repurchase commitment | $ 239,610 | $ 179,065 |
| Minimum [Member] | ||
| Other Commitments [Line Items] | ||
| Period in which DVH is obligated to pay | 18 months | |
| Maximum [Member] | ||
| Other Commitments [Line Items] | ||
| Period in which DVH is obligated to pay | 24 months |