Component of Net Sales by Region (Detail) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2015 |
Jun. 30, 2014 |
Jun. 30, 2015 |
Jun. 30, 2014 |
|
| Segment Reporting Information [Line Items] | ||||
| Net sales | $ 43,622 | $ 36,797 | $ 72,114 | $ 61,652 |
| UNITED STATES | ||||
| Segment Reporting Information [Line Items] | ||||
| Net sales | 36,854 | 28,652 | 60,119 | 47,656 |
| CANADA | ||||
| Segment Reporting Information [Line Items] | ||||
| Net sales | $ 6,768 | $ 8,145 | $ 11,995 | $ 13,996 |